It is correct and I agree with you most of the losers are out of rich people. If we calculate ratio then most of the gambler will be from low class people nad middle class people. High class people are not addicted on gambling. If they could be a gambler then they miggt not be loser even they may take all rhe fund from the gambling site.
Wealthy people do not have to think about how to buy a piece of bread after losing. They are freed from this state of searching for funds. Therefore, the mind does not think hourly about going to win back the money that was lost. Which cannot be said about poor people. After they lose money, there is a huge desire to find money again to try to win back the funds. Based on these facts, we can conclude that rich people are less at risk of becoming addicted gamblers.