The omelet they are trying to make is a deliberately reengineered American culture. It isn't primarily about the human guinea pigs, whose entry is subsidized. It is about deliberately seeking anyone & everyone
who does not have a heritage compatible with the unique values of the settler peoples who built the America that most of us cherish, from the ground up.
The immigration policy launched in 1965 is fundamentally anti-American. That needs to be understood, and not disguised by the rhetoric of the Chuck Schumers.
See An American Immigration Policy.