When you are depending on someone for assistance because you want to gamble it means that you are risking what you can not afford to lose. Why because you don't have the money to gamble but someone have to give it to you before you can stake.
But when you have jobs that pays you money so well and you are gambling it means you are risking what you can afford to lose. Why because ones you lose your job will give you another money.
However, many people would say even if you have jobs but you are staking higher it also means you are gambling with what you can not afford to lose. Moreover it's true and I have to dauth but I have a feeling that ones someone that have a good paying job is staking more than what he can afford to lose, there is no different between addiction there.
Your idea isn't completely wrong but then I wouldn't want to support it fully at some point because some persons who are depending on someone to give them money to gamble still, are able to loose certain amount and it's not a big deal for them so I wouldn't want to say they are risking that which they can't afford to loose.
On the other hand, there are people who are gambling with money which they can't afford to lose even if they have a job, but there are certain amount of money you will have you still wouldn't be able to loose them because if you do, your finances will be greatly affected so at that point, that's an amount you can't afford to loose,