People are fungible. You can't help fill jobs that "don't have enough" Americans working in them without reducing wages. That said, I do believe there are fewer programmers in America than America needs. You'd rather some foreigners be doing the work here than foreigners doing it somewhere else. You really would. A sensible immigration system would help fill these roles. If you want white people, Eastern Europe is full of them. So you can be competitive without turning into another culture.