Most pay into SS with no hope of ever getting it back (join the club) but show me where many if any of the 6.1 million pay Fed taxes and don't get them refunded? 48% of Americans pay nothing ($0) in federal tax BTW.
"Obtaining an ITIN also allows illegal immigrants to claim the federal
Child Tax Credit, which can provide them with a cash benefit of up to $1,000 per child per year. According to the
latest IRS data, 72 percent of all tax returns filed with ITINs in 2010 claimed child tax credits to receive cash payments from the federal government."
https://www.cnsnews.com/commentary/...iled-taxes-us-many-didnt-pay-received-refunds