India Incs bring in millions of foreign workers on L-1 visas – none of whom pay any taxes.
The US gov’t does not even keep track of how many L-1s come in every year – it could be in the millions.
Replace millions of highly paid Americans with armies of cheap foreign workers, and suddenly your tax base plummets. And indeed since 2000, that is exactly what has happened.
And no, you’re not immigrants – you’re temporary guest workers.