I don't think any of us really doubt that Facebook and Google could find (or train!) the talent they need in the U.S. at a price below, say, the $200,000 profit per employee Google brings in [1]. As a developer living and working in the U.S. I'd certainly love it if legislative conditions forced the above companies to hire people like me at a few hundred thousand a year more than my current salary.

The interesting question to me is whether or not there's a valid reason to suppress permanent immigration (not the revolving-door bodyshop kind) of talented developers who would effectively drive down demand for my services. Again, I'd love to see my salary double or triple overnight thanks to favorable legislation, but I don't know that I have a good economic or moral case for that preference.

[1] http://www.wolframalpha.com/input/?i=net+income+per+employee...