I think the U.S. should try to keep the best and brightest at all costs. HN is too focused on programming, but I am thinking of electronics, photonics, semiconductor, nanotech, biotech people, etc. It takes so long to train experts on these fields, and since many of them were funded via NSF as graduate students, it would be wise to create incentives for them to stay in the U.S. and be productive.

Does that mean that a founder visa is necessary? Unfortunately I don't have the data to be able to offer any insightful comment on that...