Well, if states would simply follow the advice the Office of Child Support Enforcement: set reasonable and realistic child support orders, you'd see greater compliance. Of course, the US has a fairly long history of passing extreme meausres and reforming them over time. The ramp up starting with Republican welfare reform of the mid-90's has created a certain legal environment. That environment is often unrealistic to the conditions many working Americans face, and frankly is overly punitive. The current economic recession is simply putting a spotlight on the problems of modern child support policy, that were previously ignored since they primarily affected poor men and minorities.
Will there always be a punitive measure of jail on the books for child support? I don't know, it has some issues. Dressed up as comtempt or not, you're walking on a fine constitutional line when throwing people in jail for civil debts. There are, no doubt, numerous family court abuses in which judges ulitlize civil contempt when they know there is no willful violation of a court order. The logic of the punitive measure fails. The debtor certainly will earn no income while being held in jail, the child support arrearage will merely increase, and the expense of jailing an individual is exceptionally high. The US is currently holding more people in jails than China. That's not a per cap either. Given the recession and the existing desire for prison/court reform I could certain see, in the near future, a time when a little more thought is put into whether sending an individual to jail for minor issues like child support or simple possession is actually worth the cost to soceity.