Schedule of drug prices could be particularly onerous in this regard. See direct price controls. Monopsony problem similar to Kennedy Stark. PBMs would have to allow beneficiaries access to negotiated prices. This includes, formularies, mail order pharmacies, variable copays, etc.
Discounts are available for all beneficiary drug purchases.
Allows most cost control mechanisms to be used. Requires benefit managers to establish a schedule of drug prices. These prices are available regardless of whether spending is covered. PBMs would have power to negotiate prices that would be available to beneficiaries regardless of whether drug spending in question is covered. Details remain to be fleshed out, but although they would not be at risk, PBMs would have contractual incentives to negotiate prices.