There doesn't have to be, but there will always be...through circumstances ranging from both their own fault to those out of their hands.
Another way to look at it is that if you had a society (of modern dollar value, that could magically not collapse under these circumstances) of billionaires and $1M was minimum wage, the low-end millionaires would be the poor ones.
Another way to look at it is that if you had a society (of modern dollar value, that could magically not collapse under these circumstances) of billionaires and $1M was minimum wage, the low-end millionaires would be the poor ones.