I've said this before: it's not really that there is some inherent thing about being from a country that makes people better or worse. But it certainly correlates, because of education, etc. I (and most remote north America workers) could go live in India and get the same money I do now. Nobody cares about location, but they do care about the labor market based on skills and education, and that's what they are hiring from and that's why people get paid less.