I think gambling has little to do with wealth, I mean, both poor and rich people gamble, win, loose.
The difference is that rich people don't care about loosing as much as poor people do.
If you are rich you just don't know what to do with all that money, so you play; I think I would do the same.
People who are poor are having problem as they gamble because they don't know where to get money in able to sustain their gamble acts.
But for those rich people, they have problem also. They are thinking in what things where they could spend their money.
And that is very easy thing for rich people to gamble any amount they afford to lose because they have unlimited source of capital.
So if a poor gambler because lucky and he becomes rich then he will keep on doing it.
Yeah gambling is a addiction that will be done once you are addicted to it while it doesn't matter if you are rich or poor. But there might be some differences being rich or poor, because poor or average gambler would think a lot about his gambling since he has limited funds while rich gambler might make some huge loss because he is too carefree.