So how do you see this kind of lifestyle? Do you judge them as wrong because their reason is gambling, or do you respect it since everyone has their own way of finding happiness?
Even the motivation to work hard is to fund the gambling activity, it's still way better than to take a loan since you're working to sustain your leisure time. It might be weird and seems addiction already but if you look in the good side of it, a gambler is doing what he can to not owe anybody.
Anyway, this is only good if you still don't have a family of your own. Because you're still free to do what you want with your own money. Otherwise, it's irresponsible to have such motivation.