"Cheap labor"? Do you know how much it costs a company to sponsor a candidate on an H1B visa? And then they have to pay a salary that's attractive enough for him/her to move to America (not cheap). And the health insurance.

I considered moving to the USA myself many years ago. But, at the time, I was told that I couldn't get a job without a "green" card (blue & white, actually) and I couldn't get a green card without a job. Then there was the matter of health insurance, moving costs, lawyer's fees, greasing a few palms (really) and buying a house for my family. All that plus a really weird (to a Brit, sorry) emphasis on religion. I decided not to bother.

That said, Barry Goldwater wrote me to say that he'd love to have me working in America and it was a pity that I didn't tell him while he was still in the senate legislature and could have helped. This was in 1988 when he lived up the hill in/near Scottsdale under the "preying monk" rock or whatever it's called. His house had a huge ham radio aerial on it.