Yes I wrote a post in this a while back and I don't even have kids.
It should be a government organisation that is linked to the tax guys.
When you split if you don't have a private agreement, the RP would apply to them,they would look at the earnings for the previous year (taking in to account num of children, time spent with each etc) make an assessment and pay it to the RP on a weekly/monthly basis.
They would then send a bill to the NRP and would and should have the legal power to fine/garnish wages/imprison those who don't pay. And if they have to imprison the debt would just keep climbing.
Because the assessment will be made on the previous years earning it will stop those arses who suddenly quit their jobs etc. If for some reason their earning potential had legitamitily changed, Job loss etc that should be relatively easy to prove and taken in to account but just up and quiting would be taken as an act of fraud.
For the self employed, (OH being one) the tax man gets very interested if your paying yourself a very small amount and they would be able to see if money is been hidden. And adjust the claim accordingly.
The point being that as the RP can depend on the money being paid regularly it gives them more choices.
If you know you can't afford childcare if the NRP decides not to pay that month or as in a thread before Christmas spends it on presents for the child (cause being the big present giver is more important that your child having a roof over their head...) why would you risk working and having to constantly let your employer down and end up being let go, for example. And waiting for benefits to kick back in.
the thing is most NRPs are good people and want to do their best for their children. So if this was set up /run properly they could concentrate on the arses.
It would stop NRP and children living with uncertainty. Help get people off benefits, and improve everyone's life. Non payers would be held to account and punished so the arses would have to think twice before they swan off without a backwards glance.
I know some people will say this is a bit too Big Brother. But they would only be involved with the non payers and the ones who use this as power over their ex's. So do the right thing you'll be fine.
Yes there will be some RP that might use it vindictively, but I'm will to bet it would be a tiny % compared to NRP who think that leaving their relationship means abdicating responsibility for their child.
As you can see I get a little het up about this.