I sure didn't.
The Social Security Administration estimates that about three-quarters of illegal workers pay taxes that contribute to the overall solvency of Social Security and Medicare.
Fancy that. We may not be able to afford to build that Big Bad Border Barrier - how can we fund Social Security without all these people paying into it and never drawing out? Now that is a Thing That Is Awkward.
(Kind of reminds me of all the queers who can't get survivors' benefits even after their partners pay into Social Security for their entire working lives. But, hey - apparently, we're not the only ones this system is screwing.)