If I didn’t include the intelligence caveat, one could point out lower tax countries with less opportunity, such as how Somalia is the anarcho capitalists dream. Even if the US and Switzerland are more economically free than many other more socialist western nations, intelligent demographics is makes or breaks that effect.

The average American also makes more than the average European - not only in SF. In more economically free European countries this is not the case though, but these are few. Except for the highly regulated (thus inefficient) American Heath insurance market, having a regular job is a better deal there.