Because states provide most services used by immigrants, they can be net financial losers, while the federal government is typically a net gainer. Immigrants increase unemployment and reduce wages. In line with a number of other studies, the Cato Institute found that immigrants do not increase joblessness, even among the lowest-paid workers. Other studies have found that immigration either has no effect on wage levels or, at worst, a very slight effect on a very small number of the lowest paid jobs in high-immigrant areas. There is a consensus among business leaders that immigration is vital to maintaining economic growth.
Immigrants bring disease.
Even though most immigrants come from countries poorer than the United States, recent immigrants are healthier than the U.S.-born population in virtually every particular. The Cato Institute also found that general health indicators like birth weight and infant mortality are better among babies to immigrants than to U.S.-born mothers. Immigrants degrade the environment. Since 1965, when the current high levels of immigration began, there is no evidence that the environment has worsened overall. In fact, many environmental indicators like air and water quality have generally improved.