Of course, if the average person is not 2x as rich in the US (or 0.5x as rich in the EU) then that would indicate this is a terrible measure for actual wealth.

Of course, if the average person is not 2x as rich in the US (or 0.5x as rich in the EU) then that would indicate this is a terrible measure for actual wealth. Let alone happiness etc. And that is the average person, since people naturally get richer as they age, any individual trying to decide needs to have gotten much much richer (4x plus) just to have gotten an average share...