> Let's be honest here. Silicon Valley only wants 'openness to immigration' because they can get cheap labor and the H1B Visa makes it very difficult for a person to move to another job when they get here.
Silicon Valley would probably be quite happy with a policy which allowed less overhead for visas without any visa-related job mobility restrictions. They fight for more H-1Bs not because they particularly like the H-1B, but because it's what they have, and it's a lot easier to win (or at least avoid a big loss) over quotas than over the fundamental structure of the immigration system.
Silicon Valley would probably be quite happy with a policy which allowed less overhead for visas without any visa-related job mobility restrictions. They fight for more H-1Bs not because they particularly like the H-1B, but because it's what they have, and it's a lot easier to win (or at least avoid a big loss) over quotas than over the fundamental structure of the immigration system.