I can gamble even though I have a fairly small income like $100 but maybe my bet amount will be very small, probably my largest deposit amount is no more than $2 and it certainly won't be felt especially if I use it in a type of slot game, but nothing is impossible to get a big win even though my bet is small if for example I manage to get very good luck, but it seems much better not to force the situation when my monthly income is small, I better use it for things that are more useful and beneficial.
There is nothing wrong even if one earns small and gambles. What really matters is how much is your earning and how much you spend in gambling, even with the low earning if you can gamble with the amount you can afford, I think there is no problem. It is only wrong when you ear low and you gamble with 20% or more from what you earn then it is very wrong. Most low earner find it difficult to budget a low gambling amount that they can afford, they feel playing with a big amount they stand a better chance of winning a huge amount in gambling .