The Simon Lectures addresses this very point. The US is woefully insolvent. The only way to make our half-trillion dollar a year debt INTEREST payments while keeping social-security afloat is to import a sub-strata of non-citizens. These third-world sub-citizens (in theory) will pay taxes but will remain ineligible for social security and other public service expenditures. Furthermore, republicans are merely controlled opposition and they are as invested in the racket as the dems. It’s a uni-party game of musical-chairs, and they are just trying to keep the last chairs for themselves until the inevitable collapse.