> Quality of life in places like San Francisco and New York is very high
Quality of life is also a cultural thing. I know it's hard to understand for US people (I truly believe it is the case for cultural reasons), but many people really don't want the lifestyle of the US for all sorts of reasons. For some people, quality of life means easy access to healthy food, or to nature, seeing trees instead of giant concrete parking lots or 6-lanes highways, etc.
Quality of life is also a cultural thing. I know it's hard to understand for US people (I truly believe it is the case for cultural reasons), but many people really don't want the lifestyle of the US for all sorts of reasons. For some people, quality of life means easy access to healthy food, or to nature, seeing trees instead of giant concrete parking lots or 6-lanes highways, etc.