That's not the reason most times, I know people are facing hard times and lack of money could trigger them to start looking for shortcuts like gambling and ponzi scheme but what then can say is the reason why the rich people also gamble? are they also suffering or you think they want to make more money, to the poor they are looking for fast money that's why they want to gamble to make it very fast but to the rich greed is the only thing that makes them to gamble because if they are contented with what they have tou won't see them gambling for money they will just play games to have fun and move on.
Their is no rich person that will not want to make more money because if they fails to make more money to maintain continuity, their wealth will drop and in due time, that rich man might drop to be a poor man overtime, so why am saying this is that looking for more money is not limited to poor people alone. Most of this rich men knows that gambling is not the best way of making money, that's why you will hardly see a betting shop in a rich neighborhood.
It's only those rich men that take it as a fun thing that still engage in it regularly, the rest of the rich guys don't even engage in it because hoping to make money from it is a big misstep that any rich person can ever do.