Oh, yeah.
Once an immigrant gets legal status in the USA, like a Green Card, he can apply to bring in every person in his immediate family.
The process can take years, but once your elderly parents arrive, they are eligible for SSI and Medicaid and every other benefit a natural born citizen can get.
This is not new. It was in effect in 1984, during Reagan’s presidency, although I imagine the number of people using it was much smaller.
And Medicaid
They can get social security even if they haven’t paid in?