The country you grew up in almost always has a big quality-of-life head start, because it's where your friends and family are. If you're in a poor country and

The country you grew up in almost always has a big quality-of-life head start, because it's where your friends and family are. If you're in a poor country and changing country will get you a 10x increase in salary, that might more than compensate for only seeing your loved ones for a few days every few years. But if you're already pretty well off? Not so much.