Comment by rayiner

H1B processing is hopelessly backed up for the 60-70 thousand visas we give out annually. We would have to massively cut immigration inflow, from the 1-3 million annually we have today, to make those granular determinations feasible.

I don't think individualized determination are even possible. Unless you take very few people from each country, they'll inevitably find each other and form communities. And the kinds of communities they form will be driven by their cultures. The question isn't "would this one Bangladeshi be a good immigrant." It is "when 100,000 Bangladeshis inevitably form a cultural enclave in some city, will that be better or worse than what was there before?"