Reminds me of PGs "Founders Visa" article - http://www.paulgraham.com/foundervisa.html

It is a win-win for America and hundreds of entrepreneurs in other countries where the startup ecosystem doesn't exist and ofcourse many would want to build businesses for developed economies than attempt to run something in their home economy which probably can't pay enough. They might go back and build something few yrs down the line or invest in their home countries nevertheless America would have benefited in the mean time.

And this is not even converting all H1-Bs at least the capable ones to start their own firms.