because America's not rich; like 100 people here just have more money than most countries
That isn't a coherent argument; the latter does not support the former. The median American has a lot of money and disposable income compared to almost any other country.
And then ask your if that person on the median salary has a lot of disposable income?
They might be richer than someone in a poorer country, but the median in the USA, is not rich _in_ the USA.