I know this is Canada, but the the American poublic assistance system uses the same model, so this might be of interest.....
Check it out:
http://www.vancouversun.com/life/Woman+battles+Manitoba+government+over+seized+child+support+payments/6382943/story.html
Check it out:
http://www.vancouversun.com/life/Woman+battles+Manitoba+government+over+seized+child+support+payments/6382943/story.html