OP, do you really want to hear an answer for such an obvious question? I think its obvious - rich people get less addicted to gambling, because most of them gamble for fun for real. But the rest, who say they gamble for fun, usually lie to us and themselves, because money is still matter a lot to them. Also as one of the reasons might be that rich have more options of entertainment than others, making gambling not as interesting activity as it is for the others.