Actually, the situation is pretty lousy with corruption. The fed pays states a bonus depending on how much is paid through the collection system. So, states have made a special effort to force men into the payment system to collect higher amounts of federal funding.
I believe that it probably is corrupt. I don't know about other states, but in WA, I don't see that it really hurts the dads that the state collects (other than they are required to pay.) My ex has gotten behind before (like when he went on 100% paid disability for a month and a half and it took a year for them to get that month's support back from him) and they don't even charge interest (although they are legally allowed to do so.) I am sure that it saves everyone in court costs and lawyer fees, because I don't need to go to court everytime he gets behind. (Before I was paid through the state, he gave me whatever amount of money he felt like paying, at his convenience.)
I don't think it's a great idea for the feds to waste their money on this, but... it is a very helpful service for those of us on the receiving end.