Americans have the highest level of disposable income in the world, and it's not even close. Even Europe's mega-rich tax havens like Luxembourg have a lower disposable income than Americans.
https://en.wikipedia.org/wiki/Disposable_household_and_per_c...
Yea I know the rebuttal--"but I also heard they all have $100,000 hospital bills every year!!" The disposable per capita income numbers already account for healthcare expenditures.