They're so stupid. Income Withholding Orders don't have to come from the court - they're largely considered the default way to collect child support, and most orders automatically say they're going to be put in place, so the court has already ordered that the enforcement agency can and should issue them.

The only time we didn't issue an IWO was on orders that specifically forbade it (and we would go to court to get a new order if those cases were delinquent) or if the non-custodial parent was manually paying on time.