You can't always help someone by giving them money, it has to end after a while and this has to happen very soon, the help you can give to these people can only be therapeutic and there is no other way than trying to grit your teeth and understand that you can't live on gambling alone, in fact you have to make them understand that it is absolutely important to manage your money
Giving an addicted gambler money is like supporting them to fuel their gambling desire cause the first thing the person would think of is to try again and recover what he's lost, it's not helpful. I know out of pity one might be willing to give them back what they've lost to a particular casino but in the right sense instead of helping such person with money it's best to help them correct their mentality, addiction is a disease but can be cured, through therapy that's is why addicted gamblers need therapeutic support than monetary support.