I could easily go without paying any support for 3-4 months with the FRO if I really wanted to , and then file a financial statement listing all my expenses and debts and offer to pay them back $37 a month to catchup thereafter - if that is not good for them then they have to spend thousands of dollars to take me to court - or they could decide to just cut into my paycheques - but I doubt they would do that after an offer to repay.
Not saying I would ever do that, but just to give you an idea. It's even more helpful when you're on good terms with your case worker and their supervisor. Last time I changed my address I was joking around with them telling them my new address was in Mexico - they laughed pretty hard.