I'd definitely agree with you on that.
I admit for the average person like myself it seems as though the girl's mom is getting a rather large amount of money (for the record I'm a woman). However she's been the only parent that young woman has ever known. And that big jerk certainly makes enough to be able to afford those payments.
So, you are advocating that he be required to pay an extra stipend for services not required or taken because "he can affor it"? I don't see where he is trying to end the $60K/year support, but only the $575/month day-care payments. Pay-because-you-can-afford-it sounds awfully socialist to me.
What is this. "From each according to his ability. To each, according to [her] needs"?