Sure, but if people, for example, started to declare bankruptcy due to gambling addiction, doesn't that mean that taxpayers like you and I are effectively subsidizing these gambling institutions?

That goes beyond moralism; most people don't want to pay higher taxes. I think that it's good that we have a safety-net for people who get into impossible levels of debt, but that does mean that we have an interest in figuring out ways to minimize how often bankruptcy is actually invoked.