Social Security is most likely sustainable.
MEDICARE & MEDICAID ARE NOT.
You cannot give out groceries-—rent—house down payments out of Medicaid and keep that going.
ALSO-—Health services for MILLIONS of INTRUDING ILLEGAL INVADERS isn’t sustainable NOR fair to tax paying Americans.
Medical residents are paid from the Medicare\Medicaid fund.
you could fix social security (or at least some of the problem) by going through the “disabled” and making sure they really are and are citizens.