First of all, the problem with people overspending and not being able to pay their credit card bills is supposedly taken into account by the interest rates. We know these interest rates are varied, but we know some of them are very high, at a time when we have really low prime rates. I'm beating the drum to have the individual banks before you, because they're issuing the cards.
I had a member recently say he had two daughters in university and they both wanted a credit card. He agreed but told them they'd have to hold to a $500 limit and pay it off every month. They behaved very well. But then he turns around and they both have $5,000 limits. People have to be responsible, as consumers, as holders of credit cards. But it works both ways. Is that responsible behaviour on the part of the bank? I don't think so.