And, they’ll fight over whether or not the plan allows unauthorized immigrants to come into the U.S. and get benefits

(Dawn, Specialist in Income Security, Dawn Nuschler and Alison Siskin Domestic Social Policy Division, “Social Security Benefits for Noncitizens: Current Policy and Legislation,” pg online @ https://www.everycrsreport.com/files/20050121_RL32004_2b5092caf9d7482be7998994c2c5b10d31f44afc.pdf //um-ef)

Some observers express concern that, although Section 202(y) of the Social Security Act prohibits the payment of benefits to aliens in the United States who are not lawfully present, a totalization agreement with Mexico could allow unauthorized aliens to receive payments in the United States, depending on how the agreement is written.38 They contend that a totalization agreement with Mexico may be used as a de facto way to legalize unauthorized aliens and assert that the question remains unresolved until the exact language of the agreement becomes available. Still others express concern that a totalization agreement with Mexico could provide an incentive for unauthorized workers from Mexico to come to the United States. In addition, given the Social Security system’s long-range financing problems, some question the feasibility of adding a potentially large number of recipients to the rolls in the absence of structural reform.