You can't let businessmen do that in a vacuum. They'll establish zero availability of U.S. workers by stipulating a Third World wage, or a compromise wage benchmarked to same, in order spuriously to claim that "no American workers" are available.
Of course you can't do that in a vacuum. Such a street brawl would need to be done in Congress with C-Span covering it blow by blow.
Labor will start out by claiming that not a single Guest Worker is needed.
Businees will start out by claiming that we need to import all of Mexico and at least a third of China.
In the end, the results would be:
"Do we need Guest Worker cabbage pickers?"........Yes.
"Do we need Guest Worker auto workers in Detroit auto plants?".......Only in your dreams, General Motors.
"Do we need Guest Worker carpenters?"........That depends. In San Francisco we do because nobody there wants to mess up their manicures but, in Alabama, we definately don't.
No, you need to pay citizen carpenters enough to relocate.