This will only be true as long as the quality of life gradient is so heavily tilted towards the US. As developing nations improve and if the US continues to sta

This will only be true as long as the quality of life gradient is so heavily tilted towards the US. As developing nations improve and if the US continues to starve its social institutions (schools, infrastructure, housing) that calculation may look considerably less rosy. And to top it off, the US foolishly forces some of the smartest immigrants in the world to leave rather than give them a path to citizenship!