I know a lot of people do that, they work a whole month only to get their salary at the end of the month and lose it all in gambling. I can't help but wonder how they can do that to themselves, they are wasting their time and their money at the same time by doing this, and they don't even understand what they are doing.
If their salary is only to be used to playing gambling, they will lose all of their salary, especially if they don't have self control. They will not have a chance to save that salary for their daily needs because they will attract to playing gambling and try to wins the games. When they lose in gambling, that will not makes them realizes that gambling can makes them lose all of their money but they will still trying to keeps playing gambling to recovers their lose.
They don't realizes what they do is just waste their salary for playing gambling. While they have daily needs to fills but they don't thinks that is the important thing because their focus is just playing gambling. That's why those people needs to have self control and other things that can makes them understand that their salary is for fills their daily needs and not just to playing gambling.