What's wrong with the government deciding how many foreign workers we have?
There's not necessarily anything wrong with it. But we need to be clear that that is exactly what's being suggested; just as we need to be clear that "American business" (if you'll excuse my broad brush) seems already to have decided that it wants to hire illegal aliens, despite the fact that it's illegal to do so.
This points out a more general, and more serious problem on our side of the border.