My folks often said that if you took ALL the money in the US and divided it equally among every citizen that within 5 years those who had been rich would be rich again and those who had been poor would be poor again.
This statement was always made in advance of their discussion of the difference between 'poor' and 'broke'. I got bored with the subject at the time, but they sure were right.
I think they were considering the length of time required for interest payments to kick in. A decent stock market might make it 5 days, but they were very conservative investors.