You are right, it's very common for old people to get addicted to gambling due to the fact that they are retired at that age and might not have any other thing to do with their time other than to gamble. Most of these old people get idle and lonely this is the reason why they get involved in gambling. If they are not being careful they spend all their retirement funds on gambling which makes them become penniless
Here I will against you because I am not feeling old peoples getting easily addicted its have fewer chances because they are well experienced, and they are also well aware about things which are happening around them.
Poorer can get easily and quickly because they feel this can end their problems with here age factor also works youngsters wants to have some quick mind which not think about consequences, and they jumped into things quickly which always hurt them badly this is also problem.
If some country is socially strong this can help them, but It's also not easy because now changes are happening quickly and peoples are not going ahead for having positivity around them everyone is doing for his own development.