You used the term "highest level of disposable income in the world".

Sorry to be so blunt, but it's not helpful if you look only at the average.

A better metric would be the median because it is well known that the super rich distort the disposable income in some countries (the US, but also some European countries).

I see in plutocraticish environments the rich and powerful sometimes very deftfully prevent measures inconvenient for Corporate but useful for the weaker part of the population.

I admit this also happens in Europe. But somehow it is just easier to live as a poorish person in many European countries.