Only a machine run by a newbie who doesn't cares much about his/her or their losses but about the satisfaction of the customer, which's more likely an imaginary type of satisfaction rather than something that has any relation with reality.

The cashier was stupid enough to allow a gambler to gamble with the credits without paying in advance or pre-paying for the credits and the cashier was even more stupid that he let the gambler run away without paying him even after losing that many credits.

In such case it's the fault of the cashier or the one who manages such type of gambling area because if they allow such type of activity then in most cases addict gamblers will do something like that.