And when we run out of poor countries? You could say that that can't happen because when the Chinas/Indias of the world get to our current standards we will be

And when we run out of poor countries? You could say that that can't happen because when the Chinas/Indias of the world get to our current standards we will be at a higher standard and they will still be poor relative to us, but this doesn't appear to be happening. The American middle class had a lot more money e.g. pre-Reagan than they do now.