CHILD SUPPORT - loving devoted dad OR single, spend child support on herself, partying mom?

I have lots of questions on this subject...as a woman who didn't have a biological father growing up and didn't receive any monetary support, why do the dads the do spend time with their kids, pay 1/2 of everything, etc. get screwed? My boyfriend is one of the best dads I have ever seen! He is a wonderful father to my step-daughter who is 5 and our daughter, but we are barely able to make ends meet. Now Public Aid in Illinois is taking him back to court for MORE child support. I understand as the cost of living goes up so does child support, but he pays too much money to her now! First off 22% comes out of the check I understand. But then the $115 for insurance every paycheck (he gets paid twice a week), 1/2 of daycare, and other necessities when we have her. We get her every other weekend, if we don't have her on the weekend we get her Sunday night, and we also pick her up from school on Wednesday nights and take her to school Thursday. Now I know you are thinking well he should want her because it's his daughter....she is the one that has residential custody. He got majorly screwed because he didn't seek legal representation when they first went to court because his ex told him that he didn't have to. She has residential custody and he pays child support (which totals to about $538 with the child support and insurance.) This doesn't include the clothes we buy for school, new bed sheets, toys, food, and transportation. When she is out of school daycare is $75 a week, when she is in school she is in the after-school program for $9 a week (THANK GOD!) I agree that a father should pay child support especially if he doesn't have anything to do with the child. Now, through Public Aid she is taking him back to court for more money, I am kind of worried how we are going to pay our bills depending on how much is taken out of his check. He makes GREAT money, but after child support there is hardly anything left. I may be complaining, but do any of you know a way to help get her at our house or the child support stopped. I may sound like an overbearing step-mom, but I love her very much. It just so happens she costs so much. She requires more money spent on her than our 9 month old daughter. I wouldn't mind having her all the time, but her mother would not go for it..just because she wouldn't collect money from him bi-weekly. I just feel terrible for him because we have tried finding a decent lawyer, but cannot afford it. There is no way to get a subsidized lawyer because he makes too much money...that we never see. We got calls all the time from her asking us to pick her up from school...take her to daycare....watch her on days off....can you keep her tonight I have plans....This doesn't even mention how many daycares she has put her in and taken her out of, over 9 times moved around 9 times in 4 1/2 years (probably more, but my head hurts too much to count) and most of those are boyfriend's that she brings in and out of her life...Does anyone have any ideas for us???? Please help!