Is there any effective way to make sure youths stays where the are told to stay instead of looking for quick money? Gambling isn't the solution to poverty it will possibly drown you deep into more poverty.
Effective way in general? I think there is none.
These youths are obviously have their own family. It will depend on how these youths will grow up on that family. Their own family will construct them to become a better and responsible person while they are growing up. Just trust them to grow up nicely.
We can't solely just consider gambling as the reason why turned sh*t.