the idea is a good one. If a father steadfastly refuses to help support his own children I don't see why he should continue to be able to take foreign holidays, or drive his car; surely the children's welfare should come first?
The problem lies in the Department of Work and pensions statement that their new powers would only be a "last resort" after other means of securing cash for kids have failed."
There will need to be some careful consideration to individual circumstances, such as when a father has to travel abroad to work, or when he drives for a living. If they remove his ability to generate income they remove his ability to support his children. On balance I'm in favour of the new powers, but I have misgivings about how some of the decisions will be taken, and by whom.