I've no idea if it is, but there's a big difference between a bounded amount of money and a potentially infinite amount of money earned. If he has a startup that goes somewhere, or he wins the lottery, potentially he can be out from under this in one situation, or not in the other
Yes. He owes a specific amount, and the "25-30%" showing up in articles comes from a quote of Bowser himself, where he's referring to wage garnishment.