Exactly - which is the problem. So, under Trump (as with previous POTUSes) Americans will keep getting poorer due to a labor-market so flooded, that wages don't keep up with inflation. Sure, there are "job openings" - but few pay enough to live beyond "hand to mouth." Then, they say "Americans don't want THOSE jobs," when the problem is the pay, not the occupation/work.
Employers will say, "But I can't pay more, because my competition is hiring foreigners who will live 10-to-a-room" - which is why the laws prohibiting employing illegals must be enforced, and the work-visas stopped, to stop this cycle of poverty.