There are addicted gamblers both as rich and as poor or average class gamblers, but how each one of them package themselves matters and serves as the major reasons why they were seem as being addicted or not, everyone of us cant be the same, if we carefully checked on how we are gambling, we could deduce form our own end how some have been found with unethical gambling manners, while some have maintained a responsible gambling over the years, because they have the sense of why it is needed of them to do so as they are gambling and being entertained.
You are right, both categories of people can get addicted to gambling, the rich keeps on gambling because they have enough to spare while the poor keeps gambling because they want to be rich...But it's more dangerous to the gambler that's poor, he'd want to win by all means and this might make him lose Everything that he has, this would only put him in a more precarious situation.. it's different for rich people