I don't know that you can say that financial success is more important in those countries, but I think you can say that tech is a more viable path to that financial success in those countries since careers like finance, law and medicine (the stereotypical high-paid professions in the US) mean working in their own country rather than coming to the US. If you're primarily motivated by money, as an American, there are surer paths to getting it than writing code. But as a foreigner that wants to work in the US (and therefore make more money), writing code is one of the best ways to do that.