For most people: economic opportunity. Which is itself a funny thing because it at least seems like the more socially progressive a place is the less opportuni

For most people: economic opportunity. Which is itself a funny thing because it at least seems like the more socially progressive a place is the less opportunity there is to gain financial success quickly, so you end up with this weird situation where people want to have their cake and eat it too by working in the US for 10-15 years and then moving elsewhere.