As far as the illegals paying taxes, everyone knows low income jobs don’t pay taxes...it all gets send back to them at the end of the year when they file. And if these folks are allowed to take deductions such as EIC...they’ll be getting a check from Uncle Sam as well.
FICA is a tax. One of the reasons they need to scam the illegals in is to prop up social security. It’s also a regressive tax in that the poor pay it but have shorter lifespans (and thus lower draw) than the middle and upper class who benefit from it.