2. Bigger paychecks.
Not all rich people are gamblers but they certainly have more chances to gamble if they wanted to. According to data, the higher the income is in some countries the more people gamble in that country. Since the average citizen is earning a lot, even if they spend quite a significant amount of money in gambling this will still not cause financial doom.
Sure, someone can be easier to gamble if he/she gets a bigger monthly income. He/she also potentially spend bigger amount of money in gambling. However, he/she won't be involved in gambling if there is no intention to gamble. So, I think this isn't a major factor but it is just a side factor only. Culture, legality of the gambling in a country, and mentality of individual are bigger factors that can make people to gamble more.
Gambling is an individual decision, and it is mostly as a result of tradition, there are people who gamble today because they were exposed to it when their parents gambled. There are also cultures were gambling is popular, and if you happen to grow around such a place, there is a high chance you will enjoy gambling.
Indeed. Someone can be involved in gambling because of culture or habit in their environment. If many people around us have joined gambling, we have a high chance to join gambling as well. In some countries, gambling is prohibited but there are still many people involved in gambling. It because the people have been gambling since many years ago. So, they keep gambling secretly. Even more we have online casinos now, they can gamble easily and with no doubt anymore.