“To get out of this mess they need young people to pay FICA taxes (illegals)”
That may be part of their plan, but illegals take far more than they pay. And the only way for Socialized Security to work is to have more high wage earners subsidizing the lower earners. Illegals will be in the latter category. For the few that actually pay taxes.
From the States, yes. Not so much from the Feds.