Undocumented immigrants provide an enormous subsidy to the Social Security system in particular. Each year, Social Security taxes are withheld from billions of dollars in wages earned by workers whose names and Social Security numbers do not match the
records of the Social Security Administration (SSA).
According to the SSA, undocumented immigrants paid $13 billion in payroll taxes into the Social Security Trust Funds in 2010 alone. Tax payments by undocumented immigrants and their families are also sizable at the state and local levels. The Institute for Taxation and Economic Policy (ITEP) estimates that households headed by undocumented immigrants paid $11.6 billion in state and local taxes in 2013. Cities with higher immigrant populations have less crime and stronger economies as compare to those lowest in immigrant populations.
That is why the 200+ sanctuary cities would much rather prefer to work towards helping these immigrants achieve U.S. citizen status provided they are not committing crimes. Many are at various stages of working towards becoming legal citizens. To boot all of them out may help ensure our social security goes extinct much faster.
https://www.uschamber.com/sites/def...files/022851_mythsfacts_2016_report_final.pdf