The study you cite conflates happiness and unhappiness. More money can buy less unhappiness to a _very_ large limit, much larger than $75K in the US. Most sim

The study you cite conflates happiness and unhappiness. More money can buy less unhappiness to a _very_ large limit, much larger than $75K in the US. Most simply, any serious medical treatment you have to go through will quickly blow past the $75k number. And of course even in this study the magic number is very much location-dependent, which makes it even harder to craft policy around it....