This basically renders your point meaningless, since now literally all businesses in the US are servicing the upper class.

There's relative poverty in the US still. Currency still has relative purchasing power. Saying a person living below the US poverty line should be put in the same class (upper class) as Jeff Bezos seems disingenuous as best.

Your other comments contradict themselves.

Comparing the poor of a rich nation to everyone else is an apples to oranges comparison. The poop still struggle hard in the US.