The market can't gill the void, that's the problem. People are only having 1 or 2 kids and sending them to college. Our population is aging. There are simply too few Americans who want to are are even able to do physical jobs. The idea that there are 10 millions of able body Americans willing to do physical work is a total myth. The people to do these jobs simply do not exist at any price.
And the only solution is to import a permanent underclass?