Gambling is not for the poor or those categorized as lower income groups. Rather it's for those who like it whether rich or poor and wish to earn from there.
Gambling can affect everybody. Whether you're rich, poor, no hands, no legs, disabled or whatever as long as you have access to gambling website, you can be a target.
It's just that, when the rich and poor gambler gambles and lost, only the poor people are the ones that are affected. Yes, we might see rich people losing money and getting insane, but for most of the time, it's the poor ones that are making bad decisions because of their addiction. I don't know, but I didn't hear a rich person losing huge amounts of money and then he will rob or steal other people's money. Only the poor are doing that kind of thing.