All orders for child support made or modified on or after July 1, 1990 shall include an order for immediate wage withholding in an amount equal to the support obligation and any obligation to pay support arrearages, unless the court finds good cause not to order immediate wage withholding or the parties have entered into an alternative arrangement by written agreement which is affirmatively stated in the order. In determining good cause, the court may consider a history of financial responsibility toward the family and the absence of any threat by the obligor to withhold financial support from the family.
15 V.S.A. § 781