#### J. Richard ERNST, William T. Ervin, James E. Wilson, and John Patrick O’Brien, on behalf of themselves and all others similarly situated, Plaintiffs-Appellants, v. Jay B. RISING, Treasurer of the State of Michigan; Christopher M. DeRose, Director, Department of Management and Budget Office of Retirement Systems; George M. Elworth, Member, Michigan Judges Retirement Board; Mark Haas, Member, Michigan Judges Retirement Board; Alton Davis, Member, Michigan Judges Retirement Board; Francis Spaniola, Member, Michigan Judges Retirement Board; and Chris J. Swope, Member, Michigan Judges Retirement Board, Defendants-Appellees.

No. 02-2287.

United States Court of Appeals, Sixth Circuit.

Argued: June 1, 2005.

Decided and Filed: Oct. 26, 2005.

*354ARGUED: Kenneth A. Flaska, Dawda, Mann, Mulcahy & Sadler, Bloomfield Hills, Michigan, for Appellants. Larry F. Brya, Office of the Attorney General, Lansing, Michigan, for Appellees. ON BRIEF: Chester E. Kasiborski, Jr., Bernardi, Ro-nayne *&*Glusac, Detroit, Michigan, for Appellants. Larry F. Brya, Office of the Attorney General, Lansing, Michigan, for Appellees.

Before: BOGGS, Chief Judge; MARTIN, SUHRHE INRICH, BATCHELDER, DAUGHTREY, MOORE, COLE, CLAY, GILMAN, GIBBONS, ROGERS, SUTTON, and COOK, Circuit Judges.

SUTTON, J., delivered the opinion of the court, in which BOGGS, C.J., SUHRHEINRICH, BATCHELDER, GILMAN, GIBBONS, and COOK, JJ., joined and in which ROGERS, J., joined as to Parts I—III and V, and dissented from Part IV.

CLAY, J., (pp. 373-81), delivered a separate dissenting opinion, in which MARTIN, DAUGHTREY, MOORE, and COLE, JJ., joined and in which ROGERS, J., joined as to Part II only.

OPINION

SUTTON, Circuit Judge.

Four state-court judges from Michigan filed this lawsuit under 42 U.S.C. § 1983, the Equal Protection Clauses of the United States and Michigan Constitutions, and Michigan common law, claiming that state-court judges based in Detroit and surrounding Wayne County (the 36th District) receive more favorable retirement benefits than state-court judges based elsewhere in the State. They brought the lawsuit on behalf of themselves and other similarly situated state-court judges; they filed the lawsuit in federal court; and they named several state officials, all with various responsibilities for managing the retirement system, in their official capacities as defen*355dants (“the State” or “state defendants”). Among other forms of relief, plaintiffs asked the state defendants to “make restitution ... by paying ... with interest” the difference between the retirement benefits they received and the amounts they would have received had they been treated like the 36th-District judges.

The primary issue joined by the parties is whether a government retirement system that provides benefits for all state judges (and many other state officials) is an “arm of the State” or a “political subdivision” of the State. If the retirement system is an arm of the State, the parties agree, a federal-law money-damages action (or a state-law action of any sort) against the retirement system or its officials may not proceed in federal court in light of the Tenth and Eleventh Amendments to the United States Constitution. If the retirement system is a political subdivision of the State, the parties also agree, a money-damages action of this sort may proceed in federal court.

As we see it, the retirement system is most naturally characterized as an arm of the State. It is a product of state legislation. It is run by state officials or individuals appointed by state officials. It serves state officials—not just all state-court judges in Michigan but many of the top government officials in the State (e.g., the governor, the lieutenant governor, the secretary of state, the attorney general). It is funded by the state treasury as well as by contributions from state officials. And if the retirement system faces a monetary shortfall, state legislation requires the state treasurer to make up the difference with state funds. For these reasons and those elaborated below, the district court correctly characterized the retirement system as an arm of the State. Because plaintiffs have filed only federal claims that seek monetary relief or claims that primarily seek monetary relief and because the state-law claims must be dismissed regardless of the type of relief they seek, the district court correctly dismissed all claims. To the extent the district court meant to dismiss any of plaintiffs’ claims with prejudice, however, that was error, and that portion of the order is reversed.

I.

In 1992, the Michigan legislature enacted the Judges Retirement Act, Mich. Comp. Laws §§ 38.2101-.2670, which established the judges’ retirement system in its current form. The retirement system provides defined-benefit and defined-contribution plans for most of Michigan’s state-wide officials: state trial judges (which include probate judges, district court judges and circuit court judges), state intermediate appellate judges, state supreme court justices, the governor, the lieutenant governor, the secretary of state, the attorney general, the legislative auditor general and the constitutional court administrator. *Id.*§ 38.2108.

The retirement system is managed by a board comprised of two state officials (the treasurer and the attorney general) and three appointees named by the governor with the advice and consent of the state senate. *Id.*§ 38.2202(1). The state treasurer serves as the treasurer of the retirement system, *id.*§ 38.2206(1); the state attorney general serves as the legal advis- or to the retirement system, *id.*§ 38.2207; and another state entity (the Michigan Department of Management and Budget) has responsibility “for the budgeting, procurement, and related management functions” of the retirement system, *id.*§ 38.2205.

As amended by legislation enacted in 1996, the retirement system offers all members benefits under one of two pension plans: a defined benefit plan called “Tier 1” and a defined contribution plan *356called “Tier 2.” Under both tiers, participating officials contribute a portion of their income to their retirement funds. And under both tiers, the State (and in some instances a local government as well) contributes funds to each individual’s plan. Generally speaking, Tier 1 offers a guaranteed level of fixed benefits during retirement, while Tier 2 does not guarantee fixed benefits but offers potentially higher returns on contributions. All judges who began their service before March 31, 1997, joined Tier 1 because that was the only option available to them before that date. All judges who started after that date were required to join Tier 2. Under the 1996 amendment, Tier 1 participants were authorized to move to Tier 2 if they elected to do so by a certain date in 1998. *See*D. Ct. Op. at 2.

On September 5, 2001, Judges Ernst, Ervin, Wilson and O’Brien—a probate judge, a district judge, a circuit judge and a retired circuit judge—filed a complaint on behalf of themselves and other similarly situated judges in the Eastern District of Michigan. They alleged that inequities in the retirement system violate (1) the Equal Protection Clause of the United States Constitution, (2) its counterpart in the Michigan Constitution and (3) several state-law fiduciary duties. JA 9-37. The primary inequity, the complaint alleged, was that judges of the State’s 36th Judicial District, based in Detroit and surrounding Wayne County, pay less in retirement contributions and receive more in contribution benefits than other state-court judges. *See*JA 17-19. The roots of this alleged pay-less-and-receive-more disparity are part history and part policy.

As a matter of history, the State and a local funding unit (usually a city or county) together paid all trial-level judicial salaries before 1980. *Harvey v. State,*469 Mich. 1, 664 N.W.2d 767, 769 (2003) (hereinafter *“Harvey*”). Under this dual salary system, trial-level judges belonged to two retirement systems'—a state system and a local system—and the State made retirement contributions to the one system and the relevant local government made contributions to the other. In 1980, through legislation designed to make the State responsible for all state-court operations, the legislature took on responsibility for the state and local components of the salaries (and retirement benefits) of the judges of the 36th District with the goal of eventually doing the same for all other judicial districts in the State. *Id.*Yet, “[i]n succeeding years, the goal of full state funding of court operations was not fulfilled. Nevertheless, the state continuefd] to fund one hundred percent of 36th Judicial District judges’ pensions. The retirement systems and pensions of judges outside the 36th Judicial District continue[d] to be funded by both state and local sources.” *Id.*Under the current system, as a result, 36th-District judges are the only ones who receive retirement benefits from the State based on their *total*salary level. Other judges receive state retirement benefits based on their state salary component and local retirement benefits based on their local salary component. And while these other judges may treat up to 40 percent of their local salary component as state salary for purposes of calculating state retirement benefits, judges who choose this 40-percent option must make contributions of 7 percent of the salary they treat as state salary, while 36th-District judges must contribute only 3.5 percent of the salary they treat as state salary. To the extent certain local retirement benefits are inferi- or to the state retirement benefits, as allegedly is the case in some instances, some state trial judges end up paying more to the state retirement system in order to receive the same (or nearly the same) re*357tirement income as the judges based in the 36th District.

As a matter of policy, the State has defended the current system on several grounds. It claims to need a higher compensation package to attract good lawyers to become judges in the Detroit area, and it wishes to ease the fiscal demands on the already-strapped coffers of the City of Detroit. *See id.*at 774. The State, at any rate, claims that at some point it still intends to bring all state trial judges within an exclusively state-funded system but for now “the need to reorganize and streamline [is] most urgent in Wayne County and the City of Detroit because they [are] in financial distress.” JA 98.

The upshot of plaintiffs’ lawsuit is this: they seek to bring all state-court judges within a retirement system that is exclusively funded and managed by the State. That, say plaintiffs, will eliminate these disparities—so long as the past funding inequities are alleviated through restitution and so long as plaintiffs’ retirement obligations and payments thereafter are permitted to parallel those of the 36th-District judges. Relatedly, plaintiffs also claim: (1) that state officials who participate in other state retirement plans receive better benefits than they do because those plans (unlike theirs) provide annual percentage increases in the retirement allowance for Tier 1 participants, JA 20-21; (2) that because of the way the 1996 Retirement Act calculates accrued benefits when transferring those benefits from Tier 1 to Tier 2, “it was possible for gross and unjust disparities in [transfer amount] to come into existence as to Tier 1 Plan members whose ages were but 1 day different and/or whose credited service was but 1 day different,” JA 22-24; and (3) that the State failed to distribute an alleged contribution surplus, amounting to a “wasting trust,” and breached other disclosure and management fiduciary duties, JA 28-32.

Plaintiffs have brought their disparate-treatment allegations under the Equal Protection Clause of the United States Constitution and its counterpart in the Michigan Constitution. They have brought their “wasting trust” and fiduciary-breach allegations under state law.

On September 30, 2002, the district court granted the defendants’ “motion to dismiss or, in the alternative, for summary judgment,” JA 83, on the basis of sovereign immunity. It reasoned that the retirement system was an “arm of the state” based on the structure and management of the system as well as the State’s responsibility for funding it. D. Ct. Op. at 11-12. It then ruled that the judges’ lawsuit was “barred to the extent plaintiffs seek money damages as opposed to purely prospective, injunctive relief.” *Id.*at 9, 664 N.W.2d 767. After declining to exercise supplemental jurisdiction over the state-law claims in the case, *id.*at 12-13, 664 N.W.2d 767, the court dismissed the federal-law claims with prejudice and the state-law claims without prejudice, *id.*at 14, 664 N.W.2d 767.

Throughout the course of this litigation in the district court, it bears adding, the state courts of Michigan have been considering a similar lawsuit filed by other judges, one also premised on the theory that judges of the 36th District receive better retirement benefits than other state-court judges and also based on the Equal Protection Clause of the Michigan Constitution. A state circuit court judge has twice summarily dismissed the claims, and a state court of appeals has twice reversed the decision. *See Harvey v. State,*No. 187112, 1997 WL 33354621, 1997 Mich.App. LEXIS 1214 (Mich.Ct.App. Jan. 3, 1997); *Harvey v. State,*251 Mich.App. 323, 650 N.W.2d 392 (2002). In response to the court of appeals’ most recent deci*358sion, the Michigan Supreme Court in 2003 reviewed the case and entered judgment in favor of the state defendants. *Harvey,*664 N.W.2d at 774 (holding that the legislature’s decision to treat 36th-Distriet judges differently satisfies rational-basis review); *id.*(“The state, by assuming the entire funding of the pensions of 36th District judges in the financially distressed city of Detroit, made those pensions more secure. Certainly the Legislature would or could understand that this would induce competent and qualified attorneys to become judges or to remain judges.”).

II.

A.

From birth, the States and the Federal Government have possessed certain immunities from suit in state and federal courts. *Alden v. Maine,*527 U.S. 706, 713, 119 S.Ct. 2240, 144 L.Ed.2d 636 (1999); *Monaco v. Mississippi,*292 U.S. 313, 322-23, 54 S.Ct. 745, 78 L.Ed. 1282 (1934); *Hans v. Louisiana,*134 U.S. 1, 13, 10 S.Ct. 504, 33 L.Ed. 842 (1890). For the Federal Government, that immunity flows not from any one provision in the Constitution but “is derived by implication” from the nature of sovereignty itself. *Keifer & Keifer v. Reconstruction Fin. Corp.,*306 U.S. 381, 388, 59 S.Ct. 516, 83 L.Ed. 784 (1939); *see also Monaco,*292 U.S. at 321, 54 S.Ct. 745. For the States, that immunity flows from the nature of sovereignty itself as well as the Tenth and Eleventh Amendments to the United States Constitution. *Alden,*527 U.S. at 713, 119 S.Ct. 2240 (“[T]he sovereign immunity of the States neither derives from, nor is limited by, the terms of the Eleventh Amendment. Rather, as the Constitution’s structure, its history, and the authoritative interpretations by this Court make clear, the States’ immunity from suit is a fundamental aspect of the sovereignty which the States enjoyed before the ratification of the Constitution, and which they retain today.”); *id.*at 713-14, 119 S.Ct. 2240 (“Any doubt regarding the constitutional role of the States as sovereign entities is removed by the Tenth Amendment.”). The States’ immunity from suits in federal court applies to claims against a State by citizens of the same State as well as to claims against a State by citizens of another State. *See Hans,*134 U.S. at 21, 10 S.Ct. 504; *Alden,*527 U.S. at 728, 119 S.Ct. 2240; *Barton v. Summers,*293 F.3d 944, 948 (6th Cir.2002). The immunity also applies to actions against state officials sued in their official capacity for money damages. *See Lapides v. Bd. of Regents,*535 U.S. 613, 616, 623, 122 S.Ct. 1640, 152 L.Ed.2d 806 (2002); *Edelman v. Jordan,*415 U.S. 651, 664-66, 94 S.Ct. 1347, 39 L.Ed.2d 662 (1974).

The States’ federal-court immunity comes with a host of exceptions. A State may elect to waive that immunity through legislation, *see Port Auth. Trans-Hudson Corp. v. Feeney,*495 U.S. 299, 305-09, 110 S.Ct. 1868, 109 L.Ed.2d 264 (1990), or through its conduct in litigation, *see, e.g., Lapides,*535 U.S. at 616, 122 S.Ct. 1640. The immunity does not attach if the lawsuit is not against the State or an “arm of the State.” *Mt. Healthy City Sch. Dist. Bd. of Educ. v. Doyle,*429 U.S. 274, 280, 97 S.Ct. 568, 50 L.Ed.2d 471 (1977); *see also Regents of the Univ. of Cal. v. Doe,*519 U.S. 425, 429, 117 S.Ct. 900, 137 L.Ed.2d 55 (1997); *Hess v. Port Auth. Trans-Hudson Corp.,*513 U.S. 30, 115 S.Ct. 394, 130 L.Ed.2d 245 (1994). The immunity “does not extend to counties and similar municipal corporations.” *Mt. Healthy,*429 U.S. at 280, 97 S.Ct. 568. The immunity does not apply if the lawsuit is filed against a state official for purely injunctive relief enjoining the official from violating federal law. *See Ex parte Young,*209 U.S. 123, 155-56, 28 S.Ct. 441, 52 *359L.Ed. 714 (1908). The immunity may be abrogated by Congress when exercising its enforcement authority under the Fourteenth Amendment, *Kimel v. Fla. Bd. of Regents,*528 U.S. 62, 80, 120 S.Ct. 631, 145 L.Ed.2d 522 (2000), and perhaps other enforcement clauses, such as the Fifteenth Amendment, *City of Rome v. United States,*446 U.S. 156, 178-80, 100 S.Ct. 1548, 64 L.Ed.2d 119 (1980). *See also*U.S. Const, amends. XIII, XIX, XXIV, XXVI. The immunity does not apply when the Federal Government brings the lawsuit. *See United States v. Mississippi,*380 U.S. 128, 140-41, 85 S.Ct. 808, 13 L.Ed.2d 717 (1965); *EEOC v. Ky. Ret. Sys.,*16 Fed.Appx. 443 (6th Cir.2001). And the immunity does not apply when another State brings the lawsuit on behalf of its own interests rather than those of specific citizens. *See Colorado v. New Mexico,*459 U.S. 176, 182 n. 9, 103 S.Ct. 539, 74 L.Ed.2d 348 (1982). Whether immunity exists in a given case is a question of constitutional law that we review de novo. *S.J. v. Hamilton County,*374 F.3d 416, 418 (6th Cir.2004).

In deciding whether an entity is an “arm of the State” on the one hand or a “political subdivision” on the other—the principal issue that occupies us today—the Supreme Court has considered several factors: (1) the State’s potential liability for a judgment against the entity, *Hess,*513 U.S. at 51, 115 S.Ct. 394; (2) the language by which state statutes, *id.*at 44, 115 S.Ct. 394, and state courts, *id.*at 45, 115 S.Ct. 394, refer to the entity and the degree of state control and veto power over the entity’s actions, *id.*at 44, 115 S.Ct. 394; (3) whether state or local officials appoint the board members of the entity, *id.;*and (4) whether the entity’s functions fall within the traditional purview of state or local government, *id.*at 45, 115 S.Ct. 394. In discussing these factors, the Court has emphasized that the first factor—the liability of the State for a judgment—is the foremost factor, *id.*at 51, 115 S.Ct. 394, and that it is the state treasury’s *potential*legal liability for the judgment, not whether the state treasury will pay for the judgment in *that*case, that controls the inquiry, *see Doe,*519 U.S. at 431, 117 S.Ct. 900.

Our cases follow a similar approach. In *S.J.,*we looked at the following factors: “(1) whether the state would be responsible for a judgment against the entity in question; (2) how state law defines the entity; (3) what degree of control the state maintains over the entity; and (4) the source of the entity’s funding.” 374 F.3d at 420. *See also Alkire v. Irving,*330 F.3d 802, 813 (6th Cir.2003); *Dubuc v. Mich. Bd. of Law Examiners,*342 F.3d 610, 615 (6th Cir.2003); *Brotherton v. Cleveland,*173 F.3d 552, 560 (6th Cir.1999). Earlier cases adhere to a similar approach, though they break down some of these inquiries into still other questions. *See, e.g., Hall v. Med. Coll. of Ohio,*742 F.2d 299, 302 (6th Cir.1984) (considering as well “whether the agency is performing a governmental or proprietary function; whether it has been separately incorporated; ... whether it has the power to sue and be sued and to enter into contracts; whether its property is immune from state taxation, and whether the sovereign has immunized itself from responsibility for the agency’s operations” (citation and quotations omitted)).

B.

As measured by these benchmarks, Michigan’s retirement system for state-court judges and other state officials is an arm of the State. *First,*the State would be liable for any judgment against the retirement system that existing funds of the system could not satisfy. If, for example, a federal court ordered the retirement system to pay the proposed class *360of plaintiff judges sufficient funds to equalize their retirement accounts with those of the 36th-District judges, it is quite possible that the retirement system could not satisfy that judgment and it is clear in that event that the state treasury would have to pay the bill. As state law indicates, “[t]he legislature shall annually appropriate to the retirement system the amount [of money needed] ... to reconcile the estimated appropriation made in the previous fiscal year with the actual appropriation needed to adequately fund the retirement system for the previous fiscal year.” Mich. Comp. Laws § 38.2302(1). And the Michigan Constitution makes this duty a “contractual obligation” owed by the State to each retiree. *See*Mich. Const, art. 9, § 24; *see also Musselman v. Governor,*448 Mich. 503, 533 N.W.2d 237, 246 (1995) (“We hold that the state is obligated to prefund health care benefits under art. 9, § 24.”). *See generally*Mich. Comp. Laws § 38.2208 (“The retirement system shall draw its warrants upon the state treasury, payable out of funds of the retirement system, for the payment of retirement allowances, accumulated contributions, and the payment of salaries and other expenses necessary in the administration of the retirement system.”).

*Second,*the State has extensive and detailed control over the retirement system. The system is a product of comprehensive state legislation known as the Judges Retirement Act. *Id.*§§ 38.2101-2670. The board of the retirement system “is created in [Michigan’s Department of Management and Budget],” *id.*§§ 38.2202(1), 38.2104(5), and the Department is responsible “for the budgeting, procurement, and related management functions of the retirement system,” *id.*§ 38.2205. The state treasurer is the treasurer of the retirement system, *id.*§ 38.2206(1), and the state attorney general is the legal advisor to the system, *id.*§ 38.2207.

State law also imposes extensive requirements with respect to the investment of, and custody over, the retirement system’s funds. The treasurer must invest the funds and keep custody over them in accordance with another comprehensive state statute, *id.*§ 38.2206(1), the Public Employee Retirement System Investment Act, *id.*§§ 38.1132-38.1140i, and must deposit funds “in the same manner and subject to the laws governing the deposit of state funds by the state treasurer,” *id.*§ 38.2206(2); *see also Fitzpatrick v. Bitzer,*519 F.2d 559, 565 (2d Cir.1975) (“Although the money in [the Connecticut State Employees’ Retirement System] may be used only for a designated purpose, it nonetheless remains public money.” (quotations omitted)), *rev’d in part on other grounds,*427 U.S. 445, 96 S.Ct. 2666, 49 L.Ed.2d 614 (1976); Mich. Const., art. IX, § 19 (permitting “[t]he state” to invest “funds accumulated to provide retirement ... benefits”). The retirement system must present an annual report each fiscal year to the governor and legislature “regarding the financial, actuarial, and other activities of the retirement system.” Mich Comp. Laws § 38.2209. As history proves, the Michigan legislature has the power to amend and revamp the statute as it sees fit. *See Harvey,*664 N.W.2d at 769 (detailing the history of amendments to the judges’ retirement systems in Michigan). Removing any doubt that the State controls this retirement system, the Michigan Supreme Court itself has described the retirement system in related litigation as “maintained by the state.” *Id.*

*Third,*three of the five members of the board of the retirement system are appointed by Michigan’s governor with the advice and consent of the Michigan Senate. Mich. Comp. Laws § 38.2202(1). The other two members *are*state officials: the treasurer and the attorney general. *Id.**361Board members take an oath of office, which is filed with the Michigan Secretary of State, *id.*§ 38.2203(1), and they are compensated for their expenses by the Michigan Legislature, *id.*§ 38.2202(3).

*Fourth,*the retirement system’s operations have far more in common with a traditional state function than a local one. Doubtless, a local government may create and fund a retirement system, and many local governments do just that. But when, as in this case, the retirement system is funded by annual appropriations from the state legislature, operates in part through the Michigan Treasury and in part through the State’s Department of Management and Budget, operates on a statewide basis and serves the officers of one of three essential branches of state government (the judiciary) as well as several other state-wide officials, it is fair to say that the retirement system performs a traditional state function.

In reaching this conclusion, we are not alone. In a prior unpublished decision of this court, a panel noted that a suit against a state retirement system “brought by a private individual ... would [have been] barred by the Eleventh Amendment” but for the fact that the federal government filed the lawsuit. *EEOC v. Ky. Ret. Sys.,*16 Fed.Appx. 443, 448 (6th Cir.2001). In addition to this dictum from our court, several other courts have held that state employee retirement systems are arms of the State. *See McGinty v. New York,*251 F.3d 84, 100 (2d Cir.2001) (holding that the New York Retirement System is an arm of the State); *Fitzpatrick,*519 F.2d at 561 (holding that the Connecticut State Employees’ Retirement System is an arm of the State); *JMB Group Trust IV v. Penn. Mun. Ret. Sys.,*986 F.Supp. 534, 538 (N.D.Ill.1997) (holding that the Pennsylvania Municipal Retirement System is an arm of the State where the duties and responsibilities of the Retirement System are “totally defined and limited by the Commonwealth of Pennsylvania under the provisions of the Pennsylvania Code”); *Sculthorpe v. Va. Ret. Sys.,*952 F.Supp. 307, 309-10 (E.D.Va.1997) (holding that the Virginia Retirement System is an arm of the State); *Hair v. Tenn. Consol. Ret. Sys.,*790 F.Supp. 1358, 1364 (M.D.Tenn.1992) (holding that the Tennessee Consolidated Retirement System is an arm of the State); *Mello v. Woodhouse,*755 F.Supp. 923, 930 (D.Nev.1991) (holding that the Nevada Public Employees’ Retirement Board is an arm of the State); *Reiger v. Kan. Pub. Employees Ret. Sys.,*755 F.Supp. 360, 361 (D.Kan.1990) (holding that the Kansas Public Employees Retirement System is an arm of the State); *Retired Pub. Employees’ Ass’n of Cal., Chapter 22 v. California,*614 F.Supp. 571, 573, 581 (N.D.Cal.1984) (holding “this Court is without jurisdiction to consider plaintiffs’ [ ] claim” against the “Public Employees Retirement System” of the State of California because “the Eleventh Amendment” bars claims “against the state and state officials and agencies”), *rev’d on other grounds,*799 F.2d 511 (9th Cir.1986); *United States v. South Carolina,*445 F.Supp. 1094, 1099-1100 (D.S.C. 1977) (holding that the South Carolina State Retirement System is an arm of the State); *21 Properties, Inc. v. Romney,*360 F.Supp. 1322, 1326 (N.D.Tex.1973) (holding that the New York State Teachers’ Retirement System is an arm of the State because the State would be required to increase its contributions to the retirement system to compensate for a judgment against it).

C.

In attempting to counter this conclusion, the plaintiffs make several arguments, all unconvincing. Contending that the retire*362ment system’s funds are not commingled with general state funds, they initially argue that a judgment paid for by the system’s funds would not be the equivalent of a judgment paid for by general state funds. Two statutory provisions, they add, support this conclusion'—Mich. Comp. Laws § 38.2604(6) (requiring that retirement system funds “be held in trust” and that they not be “used for or diverted to [any other] purpose”) and § 38.2208 (requiring that retirement payments be “payable out of funds of the retirement system”). The first response to this claim is that a judgment against the retirement system would not be satisfied by member contributions alone that have never been commingled with state funds. As the district court correctly reasoned and as the plaintiffs must acknowledge, “[p]art of the relief plaintiffs are seeking in this case is a refund of the allegedly overfunded Tier 1 plant,] which [the judges] concede, includes ‘the State’s mandatory contribution to the Tier 1 Plan.’ ” D. Ct. Op. at 12. Whether member contributions are commingled with state funds or not, in other words, the plaintiffs’ complaint by its terms asks for money that *the State*has contributed to these retirement accounts.

Anticipating this response, plaintiffs argue that they nonetheless are seeking no more than what the retirement system has in surplus and accordingly a judgment in this case will not compel additional monetary allocations from the state treasury. That leads to the second response to this claim: As *Regents of the University of California v. Doe*explains, the proper inquiry is not whether the state treasury would be liable in *this*case, but whether, hypothetically speaking, the state treasury would be subject to “potential legal liability” *if*the retirement system did not have the money to cover the judgment. 519 U.S. at 431, 117 S.Ct. 900.

In a variation on this contention, plaintiffs argue that the pertinent state statutes and Michigan Constitution do not compel the state treasury to pay a judgment obtained against the retirement system but compel it only to fund the system on an annual basis. But in making this argument, plaintiffs fail to come to grips with the fiscal reality that the State’s funding-requirement assuredly could increase if the retirement system were to use its current and future funding to pay off a judgment against it. Where else would the money come from? Plaintiffs never have asserted that the 36th-District judges should make up the difference-which of course would undo the very nature of the equitable system they purport to wish to establish. Rather than looking to whether a judgment would be paid directly by the state treasury, *Hess*frames the pertinent inquiry this way: “If the expenditures of the enterprise exceed receipts, is the State in fact obligated to bear and pay the resulting indebtedness of the enterprise?” 513 U.S. at 51, 115 S.Ct. 394. That, as shown, is precisely what the Michigan statutes and § 24 of Article 9 of the Michigan Constitution require of the Michigan legislature in this instance.

The plaintiffs next argue that the Michigan Supreme Court’s mandamus decision in *Musselman*establishes that this provision of the Michigan Constitution is not self-executing and that only the legislature or the governor, as opposed to the courts, may enforce it. “[I]nsofar as the plaintiffs are asking us to require the Legislature to appropriate funds for retirement health care benefits,” *Musselman*holds, “we understand that the intention of the drafters was that the second sentence of Const. 1963, art. 9, § 24, is not self-executing. Because the provision does not alter the rule that legislative action is necessary to appropriate funds, it fails to Tay[ ] down rules by means of which [its] principles *363may be given the force of law.’ ” 533 N.W.2d at 246; *see id.*(“We hold that the state is obligated to prefund health care benefits under art. 9, § 24. However, because we have no authority to order the Governor or the Legislature to appropriate funds, mandamus is denied.”). In the face of this language from *Musselman,*plaintiffs reason, the state treasury in reality would not be liable, potentially or otherwise, for any excess judgment against the retirement system because no State court could force the legislature to comply with the funding obligation.

This is a bridge too far. Such a test not only would permit this lawsuit to go forward but it also would come close to eliminating, if not completely eliminate, all state sovereign immunity in federal court—and presumably all federal sovereign immunity in federal court. Like Michigan, the National Government and each State embrace the bedrock principle of a constitutional separation of powers. *See*Jim Rossi, *Institutional Design and the Lingering Legacy of Antifederalist Separation of Powers Ideals in the States,*52 Vand. L.Rev. 1167, 1190-91 & nn. 104-07 (1999) (addressing each State’s approach in this area); John Devlin, *Toward a State Constitutional Analysis of Allocation of Powers: Legislators and Legislative Appointees Performing Administrative Functions,*66 Temp. L.Rev. 1205, 1221 (1993). And like Michigan, the National Government and virtually every State have an explicit appropriations clause in their constitutions that mandates legislative, rather than judicial, control of the treasury. Richard D. Ro-sen, *Funding “Non-Traditional” Military Operations: The Alluring Myth of a Presidential Power of the Purse,*155 Mil. L.Rev. 1, 137 & nn. 672-74 (1998) (noting that “[tjoday, all but three state constitutions (Mississippi, Rhode Island, and Utah) include some form of appropriations clause” and identifying 47 appropriations clauses); *id.*at 143 (“[Sjtates have uniformly interpreted their constitutional schemes—particularly their appropriations clauses—to command exclusive legislative supremacy over the power of the state purse.”); *id.*at 143 n. 688 (citing cases).

If plaintiffs were correct, there thus would be few, if any, settings in which States could assert a sovereign immunity defense in federal court. Even a lawsuit against *the State itself*would be permitted under this approach. Had the State of Michigan been the defendant in this case, for instance, plaintiffs still could have shown that *Musselman*prohibits state courts from compelling the legislature to make an appropriation to fund a judgment against “the State.” And if these state separation-of-powers limitations bear on this inquiry, why is it not the case that state sovereign-immunity limitations would bear on this inquiry? There, too, the ability to collect any judgment against the State or one of its alter egos would be limited by state sovereign immunity.

Both inquiries, however, look at the question through the wrong end of the lens. When a State imposes separation-of-powers or sovereign-immunity limitations on lawsuits against the State and when a potential judgment in federal court against an entity would implicate those limitations, that is further proof that the entity *is*properly characterized as an arm of the State, not that the entity is a political subdivision. Arms of the State, after all, generally may benefit from these limitations while political subdivisions generally may not. Under an alternative system, quite strangely, the more vigorously a State protected its treasury from judicial encroachment in state court the more vulnerable it would be to money-damages claims in federal court. *See Kelley v. Metro. County Bd. of Educ.,*836 F.2d 986, 995-97 (6th Cir.1987) (reasoning that the *364appropriations clause in the Tennessee Constitution provided an additional reason for applying the Eleventh Amendment to bar a federal lawsuit against a State).

Not only has the United States Supreme Court never blessed this unusual theory but its rulings in numerous cases implicitly contradict it. We are not aware of a single sovereign-immunity Supreme Court decision arising from a claim in federal court where the State at issue did not place separation-of-powers or sovereign-immunity limitations on the enforcement of money-damages judgments against the State. And most importantly, this approach cannot be squared with the “potential liability” question that the Court has told us to ask and answer. If a State’s constitution and statutory law make the State responsible for funding a certain agency’s programs, that reality makes the State potentially responsible for a judgment against that agency—no matter whether the judgment is difficult to collect, whether the State responsibility is not self-executing or whether some other feature of state law imposes hurdles on collecting the “potential liability” flowing from the judgment.

Finally, *Doe*seems directly to contradict plaintiffs’ suggestion. In *Doe,*the Ninth Circuit had concluded that a state instrumentality (the Regents of the University of California) was not an arm of the State because the Federal Government had agreed to indemnify it for any liability arising out of the lawsuit. 519 U.S. at 427-28, 117 S.Ct. 900. Writing for a unanimous Court, Justice Stevens wrote that this approach mistakenly “converged] the inquiry into a formalistic question of ultimate financial liability.” *Id.*at 431, 117 S.Ct. 900. Instead, he reasoned, “it is the entity’s potential *legal*liability, rather than its ability or inability to require a third party to reimburse it, or to discharge the liability in the first instance, that is relevant.” *Id.*(emphasis added). In the end, the Court noted: “Surely, if the sovereign State of California should buy insurance to protect itself against potential tort liability to pedestrians stumbling on the steps of the State Capitol, it would not cease to be ‘one of the United States.’ ” *Id.*The same can be said of plaintiffs’ argument here: “Surely, if the sovereign State of [Michigan] should [prevent its judiciary from forcing its legislature to make fiscal appropriations], it would not cease to be ‘one of the United States.’ ”

Relying on language from some of our cases, plaintiffs next suggest that the *only*relevant inquiry in the arm-of-the-State analysis is whether the state treasury may be impacted by a judgment in the case. *See Alkire,*330 F.3d at 811-12; *Brotherton,*173 F.3d at 561. While there can be little doubt that the state-treasury inquiry will generally be the most important one, it also seems clear that it is not “the sole criterion for determining whether an agency is a state entity for sovereign immunity purposes.” *S.J.,*374 F.3d at 421. “[T]he sovereign immunity doctrine is about money *and*dignity—it not only protects a State’s treasury, but also ‘pervasively ... emphasizes the integrity retained by each State in our federal system.’ *[Hess,*513 U.S.] at 39, 115 S.Ct. 394; *see id.*at 47, 115 S.Ct. 394 (noting that when immunity factors cut in different directions, ‘the Eleventh Amendment’s twin reasons for being remain our prime guide’ in arm-of-the-state inquiry).” *Id.; see also Seminole Tribe v. Florida,*517 U.S. 44, 58, 116 S.Ct. 1114, 134 L.Ed.2d 252 (1996) (stating that sovereign immunity “does not exist solely in order to prevent federal-court judgments that must be paid out of a State’s treasury; it also serves to avoid the indignity of subjecting a State to the coercive process of judicial tribunals at the instance of private parties” (brackets, citations and quotations omitted)). Proving the point: *365When a State is sued by name in a lawsuit, sovereign immunity bars the lawsuit regardless of whether monetary relief is sought or not, *see Pennhurst St. Sch. & Hosp. v. Halderman,*465 U.S. 89, 102, 104 S.Ct. 900, 79 L.Ed.2d 67 (1984); *see also S.J.,*374 F.3d at 421; when a State or state official is sued in federal court in a lawsuit filed under state law, sovereign immunity bars the lawsuit regardless of whether monetary relief is sought, *see Pennhurst,*465 U.S. at 102, 104 S.Ct. 900; and when state officials are sued solely for prospective injunctive relief, sovereign immunity does not apply even if the injunc-tive relief may affect the state treasury, *see Edelman,*415 U.S. at 667, 94 S.Ct. 1347. Important as the monetary liability factor may be, it is not the only factor.

Plaintiffs next argue that two decisions from other *courts—Blake v. Kline,*612 F.2d 718, 728 (3d Cir.1979), and *Boatmen’s First National Bank of Kansas City v. Kansas Public Employees Retirement System,*915 F.Supp. 131, 135 (W.D.Mo.1996)—undermine our conclusion. The Third Circuit’s decision, however, did not reverse the district court’s conclusion that sovereign immunity barred the claim; it remanded the case for further consideration. Even in doing that, the court was dealing with Pennsylvania’s Public School Employees’ Retirement Board, which serves employees of local public schools, entities that the Court has already concluded fall on the political subdivision side of the line, *see Mt. Healthy,*429 U.S. at 280-81, 97 S.Ct. 568, and whose board was primarily made up of members who *were not*appointed by state officials, *Blake,*612 F.2d at 723. In *Boatmen’s,*it is true, the court addressed a retirement system that has legitimate parallels to the Michigan retirement system. 915 F.Supp. at 135. But the court reasoned that the mere “theoretical possibility” that the Kansas treasury might one day be liable for a judgment in the case failed to make the retirement fund an arm of the State, *id.*at 137, a theory that has since been rejected by the Supreme Court, *see Doe,*519 U.S. at 431, 117 S.Ct. 900 (“[I]t is the entity’s *potential*legal liability ... that is relevant.” (emphasis added)).

That leaves a few lingering contentions raised by the plaintiffs, each of which can be addressed briefly. Plaintiffs point to the fact that the retirement system was created as a “qualified pension plan created in trust” and as an exempt organization under the Internal Revenue Code. But the federal tax treatment of an entity does not prove whether it functions more like a political subdivision or a state agency. We suspect that the Treasury Department of each State is tax exempt, and yet no one would suggest that this fact turns these quintessential state agencies into (or even begins to turn them into) political subdivisions. Plaintiffs contend that the retirement system is more proprietary than governmental because it operates for the benefit of its members only and not for the benefit of the entire State. But the system still serves a statewide purpose—providing retirement benefits for the judicial officers of the third branch of state government as well as other prominent statewide officials, all of whom indisputably serve the State. Were it otherwise, the Michigan Department of Military and Veterans Affairs would not be a state agency as it directly serves only those individuals who have served in the armed forces. Plaintiffs finally contend that the retirement system has “full autonomy” over its operations. But the statute that gives them this autonomy, *see*Mich. Comp. Laws § 38.2204, merely authorizes the board to fulfill the “proper discharge of retirement board duties pursuant to [Michigan’s] executive organization act of 1965”—an act that also organizes, among *366other state agencies, the Departments of State, the Attorney General, Treasury, Management and Budget and State Police, *id.*§ 16.104. Not only does § 38.2204 thus link the retirement system with the organizational legislation of other state agencies but it also imposes several requirements on the system that it is the duty of other departments of the State to follow—to promulgate rules under the state administrative procedures act, to hold meetings in compliance with the state open meetings law and to comply with the state freedom of information act. *Id.*

III.

Even if the district court correctly dismissed their complaint on sovereign-immunity grounds, plaintiffs argue that it should not have dismissed their federal claims *with*prejudice—that it should not, in other words, have prevented them in the future from filing the claims in state court or have prevented them from filing a permissible *Ex parte Young*claim in federal court. A district court’s decision to dismiss a claim with prejudice or without it receives abuse-of-discretion review. *Craighead v. E.F. Hutton & Co., Inc.,*899 F.2d 485, 495 (6th Cir.1990). “[EJrrors of law” invariably establish an abuse of discretion, *United States v. McDaniel,*398 F.3d 540, 544 (6th Cir.2005), and we apply de novo review in interpreting an order to determine whether it dismisses claims with prejudice, *see United States v. Spallone,*399 F.3d 415, 423 (2d Cir.2005); *cf. United States v. Moore,*131 F.3d 595, 598 (6th Cir.1997).

The district court’s decision leaves some doubt as to whether it meant to dismiss plaintiffs’ federal claims with prejudice. The opinion itself suggests only that the plaintiffs’ money-damages claims may not be refiled in federal court. For example: it says that the court lacks jurisdiction over the state defendants, D. Ct. Op. at 8; it says that “[t]his case does not belong in federal court,” *id.*at 14; and it says that the “[plaintiffs’ suit is barred *to the extent*plaintiffs seek money damages as opposed to purely prospective, injunc-tive relief,” *id.*at 9. On the other hand, the final language of the decision contains no such limitation. It simply states that “plaintiffs’ federal claims ... are dismissed with prejudice.” *Id.*at 14.

Construing the order against the backdrop of the opinion it enforces, we think the better reading of the order is that it prevents the judges only from re-filing their claims against the state defendants for monetary relief in federal court but does not prevent the judges from re-filing their federal claims in state court or from filing any permissible *Ex parte Young*claims in federal court.

This interpretation of the order not only respects the reasoning of the district court’s decision but also comports with the customary rules for dismissing claims for lack of jurisdiction. In *Costello v. United States,*365 U.S. 265, 81 S.Ct. 534, 5 L.Ed.2d 551 (1961), the Court addressed a district court’s dismissal order that failed to specify whether it was made with or without prejudice. Under the common law, the Court explained, “dismissal on a ground not going to the merits was not ordinarily a bar to a subsequent action on the same claim.” *Id.*at 285, 81 S.Ct. 534; *see also id.*at 286, 81 S.Ct. 534*(“If*the first suit was dismissed for ... the want of jurisdiction, or was disposed of on any ground which did not go to the merits of the action, the judgment rendered will prove no bar to another suit.”); Fed.R.Civ.P. 41(b) (specifying that “a dismissal for lack of jurisdiction” does not “operate[ ] as an adjudication upon the merits” unless the court “otherwise specifies”).

*367Our cases, too, recognize that dismissals for lack of jurisdiction should generally be made without prejudice. *See Bauer v. RBX Indus., Inc.,*368 F.3d 669, 581 (6th Cir.2004) (vacating a district court’s judgment for lack of jurisdiction and concluding (in reliance on Costello) that the “district court should have dismissed the [statutory] claim without prejudice”); *Mitan v. Int'l Fid. Ins. Co.,*23 Fed.Appx. 292, 297 (6th Cir.2001) (“Dismissals of actions that do not reach the merits of a claim, such as dismissals for lack of jurisdiction, ordinarily are without prejudice.”). *See also Freeman v. Oakland Unified Sch. Dist.,*179 F.3d 846, 847 (9th Cir.1999); *Voisin’s Oyster House, Inc. v. Guidry,*799 F.2d 183, 188-89 (5th Cir.1986).

“ ‘[I]n rare circumstances,’ ” it is true, “ ‘a district court may use its inherent power to dismiss with prejudice (as a sanction for misconduct) even a case over which it lacks jurisdiction.’ ” *Mitan,*23 Fed.Appx. at 298 (quoting *Caribbean Broad. Sys., Ltd. v. Cable & Wireless PLC,*148 F.3d 1080, 1091 (D.C.Cir.1998)). But there was no basis for applying any such exception here.

In the final analysis, the district court’s dismissal order was premised on a lack of jurisdiction, and the court gave no explanation for turning its back on the heavy presumption that a dismissal for lack of jurisdiction will be without prejudice. To the contrary, the decision appeared to contemplate the filing of these claims in state court or the filing of *Ex parte Young*claims in federal court. Under these circumstances, the better reading of the order is that the district court meant to dismiss the federal claims without prejudice. To the extent the district court had something else in mind (e.g., a dismissal ■with prejudice), that was error because the court gave no explanation for abandoning the assumption, based on precedent and Rule 41(b), that a dismissal for lack of jurisdiction will be made without prejudice.

IV.

Our conclusion that the dismissal ruling is without prejudice diminishes the significance of plaintiffs’ next argument—that their complaint should be construed to contain permissible requests for prospective injunctive relief under *Ex parte Young,*209 U.S. 123, 28 S.Ct. 441, 52 L.Ed. 714 (1908). While it may be that plaintiffs could frame a claim for injunctive relief that satisfies *Ex parte Young*and while our without-prejudice ruling will give them an opportunity to formulate such a claim (if they so choose), we do not interpret their current complaint to contain any such claims.

In *Ex parte Young,*209 U.S. 123, 159-60, 28 S.Ct. 441, 52 L.Ed. 714 (1908), the Supreme Court carved out an exception to the States’ constitutional immunity from suit, one that permits federal courts to enjoin state officials from the future enforcement of state legislation that violates federal law. Under the exception, “a federal court’s remedial power ... is necessarily limited to prospective injunctive relief, and may not include a retroactive award which requires the payment of funds from the state treasury.” *Edelman,*415 U.S. at 677, 94 S.Ct. 1347 (citations omitted); *see also Garten v. Kent State Univ.,*282 F.3d 391, 395 (6th Cir.2002). In distinguishing between forbidden monetary relief and permissible injunctive relief, the Supreme Court has explained that “[r]elief that in essence serves to compensate a party injured in the past by an action of a state official in his official capacity that was illegal under federal law is barred even when the state official is the named defendant.” *Papasan v. Allain,*478 U.S. 265, 278, 106 S.Ct. 2932, 92 L.Ed.2d 209 (1986), “On the other hand, *368relief that serves directly to bring an end to a present violation of federal law is not barred by the Eleventh Amendment even though accompanied by a substantial ancillary effect on the state treasury.” *Id.*The ancillary-effect exception, we have explained, “is a narrow one.” *Kelley v. Metro. County Bd. of Educ.,*836 F.2d 986, 992 (6th Cir.1987). “The dividing line” between ancillary relief and essentially compensatory relief, we have also explained, “is whether the money or the non-monetary injunction is the primary thrust of the suit.” *Barton v. Summers,*293 F.3d 944, 949 (6th Cir.2002); *id.*(“If the injunctive relief sought by the plaintiff is truly prospective non-monetary relief, sovereign immunity will not bar the suit simply because the state may be required to make *incidental*expenditures in complying with the injunction.”). We consider Eleventh Amendment immunity, as well as any exceptions to it, on a claim-by-claim basis. *See Pennhurst,*465 U.S. at 121, 104 S.Ct. 900; *Henry v. Metro. Sewer Dist.,*922 F.2d 332, 337 (6th Cir.1990). And because the purposes of *Ex parte Young*do not apply to a lawsuit designed to bring a State into compliance with *state law,*the States’ constitutional immunity from suit prohibits *all*state-law claims filed against a State in federal court, whether those claims are monetary or injunctive in nature. *See Pennhurst,*465 U.S. at 106, 104 S.Ct. 900 (explaining that the “entire basis for the doctrine of *Young*and *Edelman*disappears” when “a plaintiff alleges that a state official has violated *state*law”).

Many of plaintiffs’ 19 requests for relief in their complaint, it is clear, amount to classic requests for monetary relief. As they acknowledge in their brief, one request (¶ 12) asks the court to order the defendants “to pay” them the “Excess Contributions” made to the Tier 1 Plan, *see*Ernst Br. at 14, a claim that plaintiffs estimate has a $109 million value *(see*Ernst Reply Br. at 1) and that is anything but ancillary. Three other requests for relief are monetary in nature by their very terms, demanding that the defendants “refund ..., with interest, ... past contributions” (¶ 4), and “make restitution ... by paying ... with interest” the difference between the amounts of money they in fact received and the amounts to which they believe they are entitled (¶¶ 6 & 8). Two more paragraphs (¶¶ 10 & 11) vary the request for money only slightly by asking first for a recalculation of the value of the plaintiffs’ accounts, then by asking the court to order the defendants to “transfer the difference” between the old value and the recalculated value to the plaintiffs’ accounts. While some of these requests for relief have an equitable ring to them (the request for restitution comes to mind), that fact does not alter the monetary nature of the relief requested. *See Barton,*293 F.3d at 949 (“[Rjelief should not be granted if ‘the relief is tantamount to an award of damages for a past violation of federal law, even though styled as something else.’ ” (quoting *Papasan,*478 U.S. at 278, 106 S.Ct. 2932)).

Against this backdrop, plaintiffs specifically contend that 10 of their 19 requests for relief amount to permissible requests for injunctive relief. *See*Ernst Br. at 35-36 (citing ¶¶ 3, 5, 7, 9, 10, 11, 12, 13, 14 & 16). As an initial matter, and as already explained, ¶¶ 10-12 amount to thinly veiled requests for retroactive monetary relief.

Paragraphs 13, 14 & 16 request relief that by its terms is tied to plaintiffs’ state-law claims. The plaintiffs ask the court, for instance, to enjoin the State from transferring Tier 1 Plan funds to the “court fee fund” or to the “court equity fund.” (¶ 13). This request coincides with their state-law breach-of-fiduciary-duties claim (Count 10), where they allege that *369transfers of Tier 1 Plan funds to the “court fee fund” and the “court equity fund” are impermissible under Mich. Comp. Laws § 38.2604(6). JA 23-24. The plaintiffs next ask the court to order the State to prepare “an annual report for the current fiscal year and future fiscal years” that accounts for Tier 1 Plan activity, including transfers to the court fee fund and court equity fund. (¶ 14). This request again coincides with Count 10, where they allege a violation of trust duties because the State has “not required ... the preparation of an annual report,” leading “by way of example” to the allegedly impermissible transfers to the court fee fund and court equity fund. JA 22-23. The plaintiffs finally ask the court to enjoin the State from transferring excess funds in Tier 1 Plan accounts “to the treasury at the time of termination of the Tier 1 Plan,” and to order the State “to pay such funds to ... members, vested former members, retir-ants, and retirement allowance beneficiaries.” (¶ 16). This request also coincides with Count 10, where they allege that Mich. Comp. Laws § 38.2604(6) establishes that “the Tier 1 Plan’s assets may not be used for any purpose except for the exclusive benefit of members, vested former members, retirants, and retirement allowance beneficiaries.” JA 23. As requests for relief tied to state-law claims, we need not consider whether they are monetary or injunctive in nature, because they may not form the basis for an exception to state sovereign immunity in the federal courts in either event. *See Pennhurst,*465 U.S. at 106, 104 S.Ct. 900.

The remaining four paragraphs (¶¶ 3, 5, 7 & 9) also amount to direct requests for monetary relief and accordingly do not fall within the *Ex parte Young*exception. Two paragraphs explicitly request monetary payments, asking the court to order the defendants to “afford to Plaintiffs ... who ... have not yet retired a retirement allowance upon their retirements equal to that which judges of the 36th District Court ... will be entitled” (¶ 5) and to “afford to Plaintiffs ... an annual percentage increase” in their retirement benefits (¶ 7). And the other two paragraphs effectively ask for monetary payments, requesting that they be permitted to switch plans (¶ 9) and that the court (¶ 3) “enjoin Defendants from requiring those Plaintiffs ... who have remained as participants in the Tier 1 Plan to contribute a higher percentage of their compensation for a retirement allowance than the judges of the 36th District Court.”

In considering these four claims, it is true, “the difference between the type of relief barred by the Eleventh Amendment and that permitted under *Ex parte Young*will not in many instances be that between day and night.” *Edelman,*415 U.S. at 667, 94 S.Ct. 1347. But these claims fall on the Eleventh Amendment side of the line for three reasons. First, this is not a case in which plaintiffs have asked the court to equalize treatment by *diminishing*the benefits to the 36th-Distriet judges, and it thus is not a case in which the impact of the relief on the state treasury will be zero. As the masters of their complaint, plaintiffs asked the court for an order entitling them to a retirement allowance equal to what the 36th-District judges “will be entitled” (¶ 5), “an annual percentage increase” in their retirement benefits (¶ 7), the opportunity to switch to the allegedly more generous state plan (¶ 9) and the luxury of not having to make “higher” contributions for their retirement allowance (¶ 3). Whether out of altruism or self-interest, plaintiffs did not ask the court for an order that diminishes the benefits of their colleagues from the 36th District. They thus did not ask the court to lower the 36th-District judges’ retirement benefits to what plaintiffs “will be *370entitled,” an order decreasing the “annual percentage increase” in retirement benefits for 36th-District judges, an order forcing the judges of the 36th District to switch to plaintiffs’ retirement plan or an order forcing the judges of the 36th District to make “higher” contributions for their retirement allowance.

Confirming this interpretation of the complaint are two features of plaintiffs’ appellate briefing in this matter. At no point do they argue that their complaint seeks—or indeed that they would want— an equalization order that will not cost the State any money and that will not monetarily benefit their class of claimants. And in their reply brief, in a section addressing their claims for injunctive relief, they implicitly acknowledge that their injunction claim will require a reallocation of “dollars from the Tier I Plan’s trust fund.” *See*Reply Br. at 12 (“Here, the record does not disclose how many dollars from the Tier I Plan’s trust fund (not from Michigan’s general treasury) would have to be spent to afford Plaintiffs the prospective injunctive relief that they request.”). This case accordingly is not one in which plaintiffs either have requested an equalization order that will not cost the State any money or have simply requested an order of invalidity that leaves it to the State to determine how to comply. *Cf. Kelley v. Metro. County Bd. of Educ.,*836 F.2d 986, 993 (6th Cir.1987) (noting that the requested order in *Papasan*“would necessarily entail a corresponding *decrease*in payments” to entities previously receiving the higher benefit and that “[t]he ancillary effect of the order on the state’s treasury would be absolutely nil”).

Second, as the dissent correctly acknowledges, the Eleventh Amendment does not permit a prospective injunction that amounts to a “direct monetary award.” *Infra*at 381. *See Cory v. White,*467 U.S. 85, 90, 102 S.Ct. 2325, 72 L.Ed.2d 694 (1982); *Kelley,*836 F.2d at 995. While an injunction order may have an “ancillary” effect on the state treasury, it may not directly require payments from the state treasury. *See Kelley,*836 F.2d 986 (declining to enter prospective injunction that would require the State, as opposed to a local school board, to bear 60% of the costs of a desegregation decree).

Third, in view of the way plaintiffs have litigated this case in general and in view of the way they have crafted these four paragraphs of their complaint in particular, this relief amounts to a request for a “direct monetary award.” These counts do not involve a mere request for equal welfare benefits that leaves it to the State to determine how to equalize treatment on a going-forward basis. *See Edelman,*415 U.S. at 667, 94 S.Ct. 1347. Plaintiffs have insisted that their pension benefits be ratcheted up, a request that knows no other form of implementation than that the State make up the difference between what they would have received and what they wish to receive. If they want a retirement allowance equal to what the 36th-District judges “will be entitled” (¶ 5), if they want a remedy that “afford[s] ... an annual percentage increase in retirement allowance equivalent to the annual percentage increase afforded” to other retirement plans (¶ 7), and if they want to switch plans (¶ 9), plaintiffs have given us no explanation how such orders amount to anything less than an order directly demanding additional state funding. In trying to provide such an explanation, the dissent proposes *(infra*at 380 n. 4) that the other plans’ benefits could be immediately “lowered.” But this approach does not account for the salutary ban on “lowering” vested retirement benefits. *See*Mich. Const, art. 9 § 24; *Seitz v. Probate Judges Ret. Sys.,*189 Mich.App. 445, 474 N.W.2d 125, 128 (1991) (“[A] retirement benefit *371cannot be reduced.”)- And when plaintiffs say they want an injunction preventing them from having “to contribute a higher percentage of their compensation for a retirement allowance than the judges of the 36th District Court” (¶ 3), they face the same problem. They are not asking to pay a lower contribution in return for a lower “retirement allowance.” They want to pay a lower contribution while receiving at least the same, if not a higher, retirement allowance—a remedy that necessarily demands additional state money.

All of these problems are compounded by the fact that this case does not present a mere going-forward welfare benefit problem. Pension plans by their nature have backward-looking components to them. Because state and individual contributions to the pension system are made on an annual basis, a request that plaintiffs receive a higher pension benefit in the future not only compels greater state contributions in the future but also will compel other transfers of state funds to account for the lack of adequate contributions in the past. *See Papasan,*478 U.S. at 281, 106 S.Ct. 2932 (“We discern no substantive difference between a not-yet-extinguished liability for a past breach of trust and the continuing obligation to meet trust responsibilities asserted by the petitioners. In both cases, the trustee is required, because of the past loss of the trust corpus, to use its own resources to take the place of the corpus or the lost income from the corpus.”)

In sum, all of the identified federal requests for relief would “lead inexorably to the payment of state funds,” *Quern v. Jordan,*440 U.S. 332, 347, 99 S.Ct. 1139, 59 L.Ed.2d 358 (1979), and thus can only be regarded as requests for monetary relief. *See id.*at 347-49, 99 S.Ct. 1139 (holding that the requested relief of providing notice was not barred because it would not necessarily require state funding); *see also Green v. Mansour,*474 U.S. 64, 71, 106 S.Ct. 423, 88 L.Ed.2d 371 (1985) (holding that notice relief was barred by sovereign immunity); *id.*at 71, 73, 106 S.Ct. 423 (emphasizing that in *Quern*“the notice would not automatically lead to any particular action” and would not “bind state officials in any way,” but “the issuance of a declaratory judgment in these circumstances would have much the same effect as a full-fledged award of damages”); *Barton,*293 F.3d at 948 (holding that plaintiffs cannot avoid the Eleventh Amendment bar “by phrasing their requests for monetary relief as requests for future payments”).

Put another way, these last four requests for relief seek *nothing more*than future monetary payments. Money is not only the “primary thrust,” *id.*at 949; it is their only concern. That makes the effect on the state treasury “ancillary only to itself’ and therefore barred by sovereign immunity. *Kelley,*836 F.2d at 992; *see also Green,*474 U.S. at 71, 106 S.Ct. 423 (refusing to order declaratory relief because it was not “ancillary to the grant of some other appropriate relief’); *Barton,*293 F.3d at 950 (“A court may enter a prospective injunction that costs the state money, but only if the monetary impact is ancillary, *i.e.,*not the primary purpose of the suit.”). At the end of the day, the requested relief targets one of the most essential factors in the sovereign-immunity inquiry: state treasury liability.

> When a State submits itself, without reservation, to the jurisdiction of a court in a particular case, that jurisdiction may be used to give full effect to what the State has by its act of submission allowed to be done; and if the law permits coercion of the public officers to enforce any judgment that may be rendered, then such coercion may be employed for that purpose. But this is very far from *372authorizing the courts, when a State cannot be sued, to set up its jurisdiction over the officers in charge of the public moneys, so as to control them as against the political power in their administration of the finances of the State.

*Kelley,*836 F.2d at 991 (quoting *Louisiana v. Jumel,*107 U.S. 711, 728, 2 S.Ct. 128, 27 L.Ed. 448 (1883)); *see also Pennhurst,*465 U.S. at 101, 104 S.Ct. 900 (citing Jumel).

All of this is not to say that a permissible federal claim under *Ex parte Young*could not be formulated to challenge the retirement system—a point we do not reach today and a point that plaintiffs remain free to explore in view of our conclusion that the complaint should be dismissed without prejudice. It is only to say that these claims and these prayers for relief do not satisfy this “narrow” exception. The challenged requests for relief are either monetary by their very terms or are ancillary to nothing but monetary relief.

V.

We, lastly, reject plaintiffs’ argument that they were prejudiced by the district court’s failure to specify the rule— Rule 12 or Rule 56—-by which dismissal was granted. The district court granted “defendant’s motion to dismiss or, in the alternative, for summary judgment,” JA 83, in which the defendants moved for dismissal “pursuant to Rule 12(b) or ... pursuant to Rule 56.” *Id.*at 84. Plaintiffs argue that because a 12(b)(6) motion with attached evidentiary support must be treated as a motion for summary judgment, the district court erred in not addressing whether there were genuine issues of material fact and in ruling without affording plaintiffs additional opportunities for discovery. Yet plaintiffs acknowledge that the defendant’s motion fairly could have been characterized as a motion to dismiss for lack of subject matter jurisdiction under Rule 12(b)(1), and that when such a motion is accompanied by evidentia-ry support it is not converted into a motion for summary judgment. *See Rogers v. Stratton Indus., Inc.,*798 F.2d 913, 915 (6th Cir.1986) (“[W]here subject matter jurisdiction is challenged under Rule 12(b)(1), as it was here, the *plaintiff*has the burden of proving jurisdiction in order to survive the motion. Perhaps even more importantly, when a Rule 12(b)(6) motion is converted to a Rule 56 motion for summary judgment, the court, upon finding genuine issues as to material facts, must deny the motion; whereas on a Rule 12(b)(1) challenge to subject matter jurisdiction, the court is empowered to resolve factual disputes.”).

In addition to misconceiving the role of evidence in a motion to dismiss for lack of jurisdiction, plaintiffs have failed to show how they were prejudiced. They point to just one possible issue of material fact bearing on the jurisdictional issue: that the retirement system was overfunded by approximately $109,000,000—a fact that is “directly relevant to the determinative factor of whether or not any monetary relief afforded to [the plaintiffs] would have to be paid out of Michigan’s treasury.” Ernst Br. at 43. But as explained above, the relevant inquiry is whether the state treasury would be exposed to “potential legal liability,” *Doe,*519 U.S. at 431, 117 S.Ct. 900, *assuming*that the retirement system did not have sufficient funds to satisfy a judgment. On this record, plaintiffs have not shown how they were prejudiced by the district court’s characterization of the defendants’ motion.

VI.

For these reasons, we affirm the district court’s judgment in all respects, save to the extent the district court meant to dis*373miss the federal claims with prejudice, which was error and is reversed.

CLAY, Circuit Judge,

dissenting.

Just a few months ago, a panel of this Court recognized that in assessing whether an entity enjoys Eleventh Amendment immunity, “the most important factor is ‘will a State pay if the defendant loses?’ ” *Cash v. Hamilton County Dep’t of Adult Probation,*388 F.3d 539, 545 (6th Cir.2005) (quoting *Brotherton v. Cleveland,*173 F.3d 552, 560 (6th Cir.1999)). The majority rests its finding of immunity on unenforceable provisions of the Michigan Constitution and various state statutes that appear to require the State to provide appropriate funding for the Judges Retirement System (“JRS”); however, in light of the Michigan Supreme Court’s decision in *Musselman v. Governor of Michigan,*448 Mich. 503, 533 N.W.2d 237 (1995), it is undisputed that Plaintiffs could not obtain a judgment requiring the State treasury to honor its supposed obligation to fund the JRS, which, in fact, is no obligation at all. The State’s fulfillment of its “duty” to insure the integrity of the JRS is entirely voluntary, and therefore, that “duty” cannot provide the JRS with immunity under the Eleventh Amendment. Because the State treasury would not be potentially liable if Plaintiffs were successful in their suit against the JRS, the most important rationale for Eleventh Amendment immunity is absent. Furthermore, even if the majority were correct that the JRS is protected by Eleventh Amendment immunity, one of Plaintiffs’ central claims for relief-an injunction barring the JRS from requiring non-36th District judges from contributing a higher percentage of their compensation for their retirement allowance than is contributed by 36th District judges-would nonetheless survive under the *Ex parte Young*exception, as the claim is for prospective relief to remedy an alleged violation of the Equal Protection Clause, and need not involve any monetary cost to the JRS. I therefore respectfully dissent.

I.

A. Protection of the State Treasury

“[T]he impetus for the Eleventh Amendment” is “the prevention of federal-court judgments that must be paid out of a State’s treasury,” *Hess v. Port Auth. Trans-Hudson Corp.,*513 U.S. 30, 48, 115 S.Ct. 394, 130 L.Ed.2d 245 (1994); therefore, the starting point for determining whether the JRS is entitled to assert Eleventh Amendment immunity is to ask who would be responsible for a judgment against the JRS. *See S.J. v. Hamilton County,*374 F.3d 416, 422 (6th Cir.2004); *see also Hess,*513 U.S. at 48, 115 S.Ct. 394 (“Courts of Appeals have recognized the vulnerability of the State’s purse as the most salient factor in Eleventh Amendment determinations.”); *Dubuc v. Mich. Bd. of Law Exam’rs,*342 F.3d 610, 615 (6th Cir.2003) (“[T]he primary issue is whether the state would ultimately be liable for any money judgment against the entity.”,); *Alkire v. Irving,*330 F.3d 802, 811 (6th Cir.2003) (citing *Regents of the Univ. of Cal. v. Doe,*519 U.S. 425, 430, 117 S.Ct. 900, 137 L.Ed.2d 55 (1997)) (“The Supreme Court has now explicitly told us that [the issue of who would pay for a damage judgment against the defendant] is the most important factor bearing on the Eleventh Amendment question.”). In performing this inquiry, both this Court and the Supreme Court have emphasized that state law is important to the Eleventh Amendment analysis, because state law defines the nature of the entity claiming immunity. *See, e.g., Mt. Healthy City Sch. Dist. Bd. of Educ. v. Doyle,*429 U.S. 274, 280, 97 S.Ct. 568, 50 L.Ed.2d 471 (1977) (stating that the “answer” to whether an *374entity is considered an arm of the state or a political subdivision “depends, at least in part, upon the nature of the entity created by state law”); *Hall v. Med. Coll. of Ohio,*742 F.2d 299, 303-04 (6th Cir.1984) (noting that state “decisions and laws shedding light on the relationship of the [entity] to the state government are important, and potentially controlling”).

In *Musselman,*the Michigan Supreme Court held that State courts lack the power to compel the State legislature to appropriate funds to fulfill the obligation set forth in Art. IX, § 24 of the Michigan Constitution to satisfy the accrued financial benefits of each State pension plan. *See*533 N.W.2d at 246 (holding that “[t]he only defendant with authority to appropriate funds from the treasury is the Legislature,” and in the context of funding State pension plans, the court “lacks the power to require the Legislature to appropriate funds”). As explained by the *Musselman*court,

> This was the understanding of the drafters of art. 9, § 24, who likewise did not contemplate that the prefunding requirement could be enforced by a court. They expected that the decision to comply rested ultimately with the Legislature, whom the people would have to trust:

> It is the intention that we will put in each year enough in every fund to take care of the liability occurring during that year, so it will not go farther and farther behind.

> ... [But] there is no way to compel the legislature to appropriate money. There is no way that I know of to compel a city council to raise more money. We have to put some faith in somebody, and this is being put in the legislature. [1 Official Record, Constitutional Convention of 1961, p. 773 (delegate Brake).]

> In other words, insofar as the plaintiffs are asking us to require the Legislature to appropriate funds for retirement health care benefits, we understand that the intention of the drafters was that the second sentence of Const.1963, art. 9, § 24 is not self-executing. Because the provision is necessary to appropriate funds, it fails to “lay down rules by means of which [its] principles may be given the force of law.”

*Id.*(quoting *Davis v. Burke,*179 U.S. 399, 403, 21 S.Ct. 210, 45 L.Ed. 249 (1900) (quotation and citation omitted)). Thus, *Musselman*stands for the principle that a legal action cannot be maintained in a Michigan state court to compel the State to use treasury funds to fulfill the mandate of Art. IX, § 24. It follows, then, that Art. IX, § 24 cannot provide the basis for any subsequent legal action in federal court to compel the State to devote treasury funds towards fulfilling a judgment against a retirement system such as the JRS. The Eleventh Amendment would clearly bar any action to compel the State legislature to act, inasmuch as the legislature is an arm of the State. *Cf. Eldridge v. Gibson,*332 F.3d 1019, 1021-22 (6th Cir.2003) (state court “is clearly a branch of the state and as such is protected from suit by the Eleventh Amendment”); *Johns v. Supreme Court of Ohio,*753 F.2d 524, 526 (6th Cir.1985) (holding that suit against justices of State Supreme Court was barred by Eleventh Amendment as the State was clearly “the real party in interest”). Further, because there can be no legal action to enforce the Michigan Constitution against the State treasury, there can be no such action to enforce any of the relevant Michigan statutes against the State treasury. In other words, there can be *no action in any cowi*to force the State treasury to pay any part of a judgment relating to a federal claim in a law*375suit concerning the JRS; therefore, the State treasury is not subject to any potential legal liability. *See Doe,*519 U.S. at 431, 117 S.Ct. 900 (holding that the underlying legal question in Eleventh Amendment immunity analysis “is the entity’s potential legal liability”).

The majority purports to recognize that, under the Supreme Court’s decisions in *Hess*and *Doe,*the State treasury’s potential legal liability is the most important factor in the Eleventh Amendment analysis, yet it rejects Plaintiffs’ argument that, in light of *Musselman,*the State treasury faces no potential legal liability from an adverse judgment against the JRS. According to the majority, acceptance of Plaintiffs’ argument would preclude sovereign immunity in all cases, including those cases where the State is a named defendant, because most states have constitutions that mandate legislative, rather than judicial, control of the treasury. Therefore, the majority’s argument goes, “the more vigorously a State protected its treasury from judicial encroachment in state court the more vulnerable it would be to money-damages claims in federal court.” *See*Maj. Op. Part II.C. This argument has facial appeal, but one need not go any further than *Hess*to see that it is fundamentally flawed. Because the ‘impetus’ for the Eleventh Amendment is protection of the State treasury from federal-court judgments, “[t]he purpose of the immunity ... largely disappears when a judgment against the entity does not entail a judgment against the state.” *Jacintoporb Corp. v. Greater Baton Rouge Port Comm’n,*762 F.2d 435, 440 (5th Cir.1985) (quoted in *Hess,*513 U.S. at 49, 115 S.Ct. 394); *see also Metcalf & Eddy, Inc. v. Puerto Rico Aqueduct and Sewer Auth.,*991 F.2d 935, 942-3 (1st Cir.1993) (quoted in *Hess,*513 U.S. at 48, 115 S.Ct. 394) (“First, and most fundamentally, [the entity’s] inability to tap the Commonwealth treasury or pledge the Commonwealth’s credit leaves it unable to exercise the power of the purse. On this basis, [the entity] is ill-deserving of Eleventh Amendment protection.”). Where, as here, a judgment against the entity would not open up the State treasury to any potential legal liability, *Hess*teaches that the entity is not entitled to assert Eleventh Amendment immunity.

B. Importance of Other Factors in Eleventh Amendment Immunity Analysis

While the most important factor in Eleventh Amendment immunity analysis is “the prevention of federal-court judgments that must be paid out of a State’s treasury,” *Hess,*513 U.S. at 48, 115 S.Ct. 394, the majority relies on the statement that “the sovereign immunity doctrine is about money *and*dignity,” *S.J., supra,*374 F.3d at 421 (emphasis in original).1

*376While it is undoubtedly true that “current Eleventh Amendment jurisprudence emphasizes the integrity retained by each State in our federal system,” *Hess,*513 U.S. at 39, 115 S.Ct. 394, and that there may be other factors in the immunity analysis, this Court’s Eleventh Amendment cases make clear that after *Hess*and *Doe,*the most significant factor is the State treasury’s potential legal liability. *See Cash,*388 F.3d at 545; *Dubuc,*342 F.3d at 615; *Alkire,*330 F.3d at 811; *Brotherton,*173 F.3d at 560. Further, our post-Ness cases imply that where, as here, it is clear that the State treasury has no potential legal liability, the importance of the other factors in the immunity analysis is diminished. For example, in *Dubuc,*we concluded that where no evidence was presented regarding the issue of whether the funds to satisfy a judgment would come from the State treasury, the other factors may be considered. *See*342 F.3d at 615 (“The parties have not submitted any evidence regarding whether the State of Michigan would be ultimately responsible for any money judgment against the Board or the Bar. The other factors, however, weigh in favor of finding the Board and the Bar immune from this lawsuit.”). By implication, then, if the evidence overwhelmingly demonstrates that the State will not be responsible for a judgment against the defendant entity, consideration of the other factors is unnecessary. This is consistent with our analysis in *Brother-ton,*where, because it was clear that the State would not be responsible for paying a judgment against the defendants, we found it unnecessary to determine whether *Hess*’ emphasis on the State treasury is “dispositive,” or rather, whether it “plac[es] significant weight on one factor of a multi-factor test.” 173 F.3d at 561. Not only does this statement demonstrate that the State treasury issue is clearly the most important factor after *Hess,*it strongly suggests that where it is clear that the State will not be responsible for paying a money judgment against the entity, the other factors are unimportant. Thus, the majority’s reliance on other factors is unavailing given that it is clear the State of Michigan has no potential legal liability for a judgment against the JRS.

Even assuming that factors other than the State treasury liability issue have some relevance in the instant case, they still would not cut in favor of immunity, in part because some of those other factors also cut in favor of finding the JRS akin to a municipality rather than a political subdivision. Functionally, the JRS is more aptly characterized as proprietary rather than governmental, because the JRS operates for profit and for the material benefit of itself and its beneficiaries, not for the material benefit of the general public.2 Additionally, the JRS enjoys a fair degree of autonomy. *See, e.g.,*Mich. Comp. Laws § 38.2204(1) (“The retirement board has *377the rights, authority, and discretion in the proper discharge of retirement board duties pursuant to the executive organization act of 1965, Act No. 380 of the Public Acts of 1965 .... ”)• It is undisputed that the JRS can sue and be sued in state court, and that it has the authority to enter into contracts with private individuals or corporations. *See*Mich. Comp. Laws § 38.2205. Further, the record reflects that the JRS has contracted with the State and paid the State money for things such as building rentals, technological support, investment services, and fees to the Attorney General. Although other factors in the immunity analysis may weigh in favor of finding that the JRS is an arm of the state, balanced against the state treasury liability issue, the most important factor, as well as the JRS’s proprietary function, autonomy and contracting abilities, it is clear that the JRS is not entitled to assert Eleventh Amendment immunity. The majority’s conclusion to the contrary misses the mark entirely.

Finally, the majority’s citation to other cases that it claims “have held that state employee retirement systems are arms of the State” is unpersuasive. *See*Maj. Op. Part II.B. While on the surface these cases may appear to support the majority’s position, upon closer examination it is clear that most are distinguishable or, at the very least, are of questionable import inasmuch as they fail to recognize that the paramount issue is the State treasury’s potential legal liability. For example, *Fitzpatrick v. Bitzer*is distinguishable because unlike the JRS, the Connecticut Retirement Fund at issue in that ease had “none of the indicia of independence from the state, such as separate incorporation or a power to sue in its own name.” 519 F.2d 559, 565 (2d Cir.), *rev’d in part on other grounds,*427 U.S. 445, 96 S.Ct. 2666, 49 L.Ed.2d 614 (1976). In *Fitzpatrick,*“[a] judgment against the fund would thus *automatically*increase the obligations of the general state treasury and amount to a judgment against the state.” *Id.*(emphasis added). Far from being automatic, the State’s potential legal liability here is entirely hypothetical, given that the State legislature has no enforceable obligation to fund the JRS. *Cf. Boatmen’s First Nat’l Bank of Kansas City v. Kan. Pub. Employees Ret. Sys.,*915 F.Supp. 131, 137-38 (W.D.Mo.1996) (“[T]o show a greater connection to the state treasury, KPERS relies on a more attenuated scenario-the theoretical possibility that someday KPERS will incur an enormous judgment that will require it to increase the rate of employer contributions to make up the shortfall. KPERS asserts that this hypothetical and roundabout connection to the Kansas state treasury is sufficient to satisfy the *Hess*standard. The Court disagrees. The mere possibility of having to pay for a judgment is simply not good enough.”); *Bowen v. Hackett,*387 F.Supp. 1212, 1221 (D.R.I.1975) (“The fact that the General Assembly may feel morally obligated to replenish the funds in time of emergency is of no consequence. Such a possible ancillary effect on the state’s general treasury is simply too attenuated to bring the Eleventh Amendment into play.”) (citation omitted). Similarly, in *Hair v. Tenn. Con-sol. Ret. Sys.,*another case cited by the majority, the retirement system at issue had to submit a budget request to the State legislature for its annual operating-expenses, and thus a judgment against the entity “would require a special appropriation from the [Tennessee] General Assembly.” 790 F.Supp. 1358, 1364 (M.D.Tenn.1992). Again, this situation is distinguishable from the JRS, which pays its own operating expenses.

Other cases cited by the majority fail to perform any meaningful analysis of Eleventh Amendment immunity, or rely on al*378together faulty reasoning. *See, e.g., JMB Group Trust IV v. Penn. Mun. Ret. Sys.,*986 F.Supp. 534, 538 (N.D.Ill.1997) (holding, in contravention of *Hess,*that because retirement system is “subject to the direction and control” of the State, “the court need not address whether a judgment against the PMRS would have an effect upon the Pennsylvania State Treasury”); Scul*thorpe v. Va. Ret. Sys.,*952 F.Supp. 307, 309-10 (E.D.Va.1997) (finding without analysis that retirement system is an arm of the state); *Mello v. Woodhouse,*755 F.Supp. 923, 926 (D.Nev.1991) (same); *Reiger v. Kan. Pub. Employees Ret. Sys.,*755 F.Supp. 360 (D.Kan.1990) (short memorandum and order finding, without analysis, that retirement system is an arm of the state); *United States v. South Carolina,*445 F.Supp. 1094, 1099-1100 (D.S.C.1977) (finding without analysis that retirement system is an arm of the state).

The majority impermissibly departs from clear Supreme Court and Sixth Circuit precedent by holding that the JRS is entitled to assert Eleventh Amendment immunity. Under existing case law, most notably *Hess,*the most important factor in the Eleventh Amendment analysis-the State treasury’s potential legal liability-is clearly not implicated here. Neither the other possible factors in the Eleventh Amendment immunity analysis, nor the other retirement system cases cited by the majority, alter the fact that *Musselman*makes clear that the State has no obligation to fund the JRS, and it could not be forced to pay a judgment on the JRS’ behalf. Therefore, the JRS is not entitled to assert Eleventh Amendment immunity.

II.

Plaintiffs’ Complaint includes claims for retrospective monetary relief, as well as claims for injunctive and declaratory relief. Even assuming *arguendo*that there is a potential threat to the State’s coffers that is sufficiently palpable to justify Eleventh Amendment immunity from Plaintiffs’ claims for retrospective relief, the same threat does not exist regarding Plaintiffs’ claims for prospective relief.

The majority inappropriately recasts all of Plaintiffs’ claims as requests for monetary relief. Plaintiffs’ central claim is that the Judges Retirement Act violates the Equal Protection Clause by affording more favorable treatment to 36th District judges. Plaintiffs’ Complaint requests, *inter alia,*that the Court “[preliminarily and permanently enjoin Defendants from requiring those Plaintiffs and members of The Class who have remained as participants in the Tier I Plan to contribute a higher percentage of their compensation for a retirement allowance than judges of the 36th District Court[.]” Complaint at 24 ¶ 3; Joint Appendix, “J.A.,” at 32-3. According to the majority, “[tjhrough this claim ... plaintiffs seek to obtain the same level of benefits while paying a lower contribution amount, a remedy that would require the State to make up the difference and that accordingly constitutes a direct request for monetary relief.” Maj. Op. Part IV. However, an alternative remedy exists that would not threaten the State treasury.3 If a court were to find in *379favor of Plaintiffs on their equal protection claim, it could simply mandate that the JRS stop affording the judges of the 36th District Court more favorable treatment. In other words, equality could be obtained by requiring the 36th District judges to contribute a higher percentage, rather than reducing the percentage that non-36th District judges contribute. This remedy would not only eliminate the allegedly unconstitutional classification of judges, but would actually cost the JRS *less*money than the current system. *See Heckler v. Mathews,*465 U.S. 728, 740, 104 S.Ct. 1387, 79 L.Ed.2d 646 (1984) (quoting *Iowa-Des Moines Nat’l Bank v. Bennett,*284 U.S. 239, 247, 52 S.Ct. 133, 76 L.Ed. 265 (1931)) (“[Wjhen the ‘right invoked is that of equal treatment,’ the appropriate remedy is a mandate of *equal*treatment, a result that can be accomplished by withdrawal of benefits from the favored class as well as by extension of benefits to the excluded class.”) (emphasis in original); *see also Davis v. Mich. Dep’t of Treasury,*489 U.S. 803, 818, 109 S.Ct. 1500, 103 L.Ed.2d 891 (1989) (“In this case, appellant’s claim could be resolved either by extending the tax exemption to retired federal employees (or to all retired employees), or by eliminating the exemption for retired state and local government employees.”); *cf. Kelley v. Metro. County Bd. of Educ.,*836 F.2d 986, 993 (6th Cir.1987) (discussing situation where court ordered the payment of equal benefits to two groups that had been receiving disparate benefits, and noting that equalization “would necessarily entail a corresponding *decrease*in payments” to entities previously receiving the higher benefit, thus “[t]he ancillary effect of the order on the state’s treasury would be absolutely nil, except insofar as the state might elect voluntarily to increase appropriations from the general funds of the state .... ”). The same principle applies to Plaintiffs’ request for an order providing that members of the Tier I Plan who have not yet retired be afforded a retirement allowance equal to similarly situated judges of the 36th District Court. *See*Compl. at 25 ¶ 5; J.A. at 33. Such an order would result in *less*of a potential drain on the JRS if the JRS merely reduced the retirement allowances of 36th District judges to the allowance level afforded all other judges. *Cf. Heckler,*465 U.S. at 740, 104 S.Ct. 1387. Accordingly, at the very least, the Court should deny immunity for these types of claims for prospective relief.

*380The majority’s analysis of Plaintiffs’ request for injunctive prospective relief to redress an alleged violation of the Equal Protection Clause due to the disparity between 36th and non-36th District judges is also inconsistent with *Papasan v. Allain,*478 U.S. 265, 106 S.Ct. 2932, 92 L.Ed.2d 209 (1986). In discussing the plaintiffs’ claim for prospective relief to remedy an ongoing equal protection violation, the Supreme Court in *Papasan*stated:

> This alleged ongoing constitutional violation-the unequal distribution by the State of the benefits of the State’s school lands-is precisely the type of continuing violation for which a remedy may permissibly be fashioned under *[Ex parte*] *Young.*It may be that the current disparity results directly from the same actions in the past that are the subject of the petitioners’ trust claims, but the essence of the equal protection allegation is the present disparity in the distribution of the benefits of state-held assets and not in the past actions of the State. A remedy to eliminate this current disparity, even a remedy that might require the expenditure of state funds, would ensure “ ‘compliance *in the future*with a substantive federal-question determination’ ” rather than bestow an award for accrued monetary liability.

> ... [W]e agree with the Court of Appeals that the Eleventh Amendment would not bar relief necessary to correct a current violation of the Equal Protection Clause and that this claim may not be properly dismissed on this basis.

*Id.*at 282, 106 S.Ct. 2932 (quoting *Milliken v. Bradley,*433 U.S. 267, 289, 97 S.Ct. 2749, 53 L.Ed.2d 745 (1977) (quoting *Edelman v. Jordan,*415 U.S. 651, 668, 94 S.Ct. 1347, 39 L.Ed.2d 662 (1974))) (emphasis in original).4 As in *Papasan,*Plaintiffs here allege a present and ongoing violation of the Equal Protection Clause. The injunc-tive relief sought by Plaintiffs to remedy the disparity in the contributions of, and disbursements to, 36th District judges and non-36th District judges is purely prospective, and would therefore ensure future compliance with the federal constitution. *Id.*Under the Supreme Court’s reasoning in *Papasan,*the Eleventh Amendment is not a bar to such relief; thus, the majority’s dismissal of Plaintiffs’ claim for prospective injunctive relief is improper.

Although it is clear that the JRS could remedy the alleged inequities between 36th and non-36th District judges without expending additional funds, the Eleventh Amendment would not bar Plaintiffs’ request for prospective injunctive relief even if the JRS was required to pay additional monies in order to comply with the Equal Protection Clause. This is because *Papa-san*teaches that “relief that serves directly to bring an end to a present violation of federal law is not barred by the Eleventh Amendment even though accompanied by a substantial ancillary effect on the state treasury.” *Id.*at 278, 106 S.Ct. 2932; *see also Edelman,*415 U.S. at 668, 94 S.Ct. 1347 (“[A]n ancillary effect on the state treasury is a permissible and often an inevitable consequence of the principle an*381nounced in *Ex parte Young.”).*“A court may enter a prospective injunction only if the monetary impact is ancillary, *i.e.,*not the primary purpose of the suit.” *Barton v. Summers,*293 F.3d 944, 950 (6th Cir.2002). In the instant case, even if an injunction barring the state from requiring non-36th District judges to contribute a higher percentage of their compensation required a larger outlay of funds by the JRS, any such expenditure would be ancillary to the primary purpose of the injunc-tive relief, which is to remedy an alleged violation of the Equal Protection Clause. By its plain terms, the purpose of the request for injunctive relief is to enjoin Defendants from requiring Plaintiffs and class members who are Tier 1 Plan participants “to contribute a higher percentage of their compensation for a retirement allowance than judges of the 36th District Court[.]” Compl. at 24-25 ¶ 3; J.A. at 32-33. In other words, Plaintiffs are not requesting a direct monetary award in ¶ 3, but rather, an equal playing field in the percentage that 36th and non-36th District judges must pay into the Tier 1 Plan. If, “as a necessary consequence of compliance in the future with a substantive federal-question determination,” the State must pay additional costs, the Eleventh Amendment is not implicated because any effect on the State treasury is purely ancillary. *Edelman,*415 U.S. at 668, 94 S.Ct. 1347.5 Thus, the Eleventh Amendment is not implicated by Plaintiffs’ request for an injunction barring the state from requiring greater percentage contributions from non-36th District judges.

III.

The central concern of the Eleventh Amendment is the protection of state treasuries from potential legal liability. In the instant case, there is no question that the State treasury would not be responsible for a judgment against the JRS; the State has no enforceable obligation to fund the JRS, and the State could not be required to pay a judgment on behalf of the JRS. By finding that the Eleventh Amendment is applicable even where the impetus for immunity is clearly not implicated, the majority impermissibly broadens the ambit of the amendment. Allowing the JRS to assert immunity extends the scope of the Eleventh Amendment far beyond what either this Court or the Supreme Court have previously identified as its limits. I must therefore respectfully dissent.6

1

. At least one commentator has persuasively argued that the “dignity” rationale does little to protect state interests, and may actually cut against state sovereign immunity and in favor of civil liability. *See*Ernest A. Young, *State Sovereign Immunity and the Future of Federalism,*1999 Sup. Ct. Rev. 1, 53-4. Quoting Justice Wilson's statement in *Chisolm v. Georgia*(the case that prompted the Eleventh Amendment), that “ '[a] State; useful and valuable as the contrivance is, is the inferior contrivance of man; and from his native dignity derives all its acquired importance.' " Professor Young notes that “[a] state has an interest in preserving the integrity of its internal decision-making processes, for example, because that will insure that it remains responsive and accountable to its citizens and not to some other body.” *Id.*at 53 (quoting *Chisolm v. Georgia, 2*U.S. (2 Dall) 419, 455, 1 L.Ed. 440 (1793)) (Opinion of Wilson, J.). Defining dignity “as the credibility of public institutions,” Young concludes that dignity “might cut in favor of civil liability,” because "[i]n our constitutional tradition, confidence in the government arises rather directly from *376the proposition that the government is subject to the rule of law.” *Id.*at 54 (citing Andrzej Rapaczynski, *From Sovereignty to Process: The Jurisprudence of Federalism After Garcia,*1985 Sur. Ct. Rev. 341, 357). Thus, "the dignitary argument is far from compelling when placed in the context of modern sovereign immunity doctrine.” *Id.*

2

*.*A "governmental function” is defined as the legally authorized conduct of a government agency "that is carried out for the benefit of the general public.” Black's Law Dictionary (7lh ed.1999). Conversely, a "proprietary function” is "[a] municipality's conduct that is performed for the profit or benefit of the municipality rather than for the benefit of the general public.” *Id.*at 1235. Although one could argue that a financially stable judicial retirement system benefits the public to the extent that it contributes to the retention of judges and the smooth functioning of the judiciary, the JRS nevertheless is primarily proprietary in nature.

3

. In Part IV of its opinion, the majority incorrectly construes several portions of the Complaint as expressly requesting that the JRS increase Plaintiffs’ benefits. For example, Plaintiffs request "an annual percentage increase in retirement allowance equivalent to the annual percentage increase afforded to by other state funded retirement systems.” The

majority argues that the JRS can only make the benefits equal by increasing the benefits of others. If the state lowered the percentage increase to all retirement systems, however, it would be in compliance with the requested relief without increasing Plaintiffs’ benefits. Similarly, Plaintiffs’ request for an injunction precluding the JRS from forcing them to *379"contribute a higher percentage of their compensation for a retirement allowance than the judges of the 36th District Court,” can be accomplished by raising the 36th District judges' contribution rates. In fact, this holds true of all the relevant examples cited by the majority.

Recognizing this problem, the majority attempts to argue that the Michigan Constitution prevents the JRS from lowering vested benefits, and thus, leaves them with the sole alternative of raising Plaintiffs’ benefits. This provision, however, has limited applicability. First, it does not prevent the JRS from changing how benefits accrue in the future. *In re Enrolled Senate Bill 1269,*209 N.W.2d at 200, 203 (Mich.1973) ("[B]ut we think [the Michigan legislature] may properly attach new conditions for earning financial benefits which have not yet accrued. Even though compliance with new conditions may be necessary in order to obtain the financial benefits which have accrued, we would not regard this as a diminishment or impairment ....”). Changing how benefits accrue certainly enables the JRS to alter the conditions of its plans without incurring huge expenses. Moreover, this provision has no effect on the JRS's ability to raise the contribution rates of 36th District judges in order to equalize all beneficiaries contributions. *Id.*at 201, 203 (holding that the Michigan legislature could raise contribution rates without granting a corresponding increase in benefits without violating article IX, section 24 of the Michigan Constitution). Thus, the JRS does not necessarily incur additional costs by raising contributions.

4

. *Papasan*involved essentially two claims, a claim for trust income benefits and an equal protection claim, both relating to the allegedly unequal distribution of public school land. The Court denied relief on the trust claim, because "the trustee is required, because of past loss of the trust corpus, to use its own resources to take the place of the corpus or the lost income from the corpus.” *Papasan,*478 U.S. at 281, 106 S.Ct. 2932. This problem is not presented by Plaintiffs' claim for prospective injunctive relief, because, as is discussed above, equality in contributions and in the disbursement of benefits to 36th and non-36th District judges, going forward, can be accomplished without reducing the amount of funds in the trust.

5

. *See also Quern v. Jordan,*440 U.S. 332, 349, 99 S.Ct. 1139, 59 L.Ed.2d 358 (1979) (holding that state could be required to provide notice to welfare recipients that they may be eligible for past benefits, and that the cost of such notice is ancillary to prospective relief awarded by the district court); *Milliken,*433 U.S. at 289-90, 97 S.Ct. 2749 (upholding injunctive relief requiring state to pay the future costs of educational components in order to "wipe out continuing conditions of inequality produced by the inherently unequal dual school system long maintained in Detroit.”); *Thomson v. Harmony,*65 F.3d 1314, 1321 (6th Cir.1995) (stating that "expense of implementing” requested relief of reinstatement to job, support as researcher and removal of negative personnel record entries would be ancillary to purpose of suit); *Doe v. Wigginton,*21 F.3d 733, 737 (6th Cir.1994) (finding that if injunctive relief ordering state to provide HIV tests to prison inmates upon request were granted, cost of tests would have an ancillaiy effect on state treasury).

6

. Because I believe that the Eleventh Amendment is not implicated here, and would hold that the district court improperly dismissed Plaintiffs' claims, it is unnecessary for me to reach the final two issues discussed by the majority, *i.e.,*whether the district court dismissed Plaintiffs’ claims with or without prej*382udice, and whether Plaintiffs were prejudiced by the district court's failure to specify whether it was dismissing under Rule 12 or Rule 56.