I've no clue what the government are thinking with this one. Well I do. They are simply assuming that 95% of parents will put their children's needs above their own and sit down to rationally talk about how much is best. Pretty laughable really. Most simply won't be able to or even want to.
Even those parents who do generally get on. Nothing is likely to divide them faster than talking about money. Before you know it, there'll be huge arguments and positions taken on 'principle' about how many pairs of shoes a year little Johnny needs.
The only silver lining (and it's a tenuous one at that) is that if you pay for a service then they really need to be able to deliver. And maybe a large reduction of the number of cases will help them do that.
The CSA is a victim of it's own non-success. So many evade it that it's become farcical. The threat of "I'm going to the CSA" is about as useful as "I'm going to the moon"
In reality what the CSA/CMEC really need to do is crackdown on evaders. Stick a few of them in prison. Crawl up the anal cavities of suspected dodgers with a microscope to look for hidden assets, hound them with debt collectors, cancel their passports so they can't go on swanky holidays. Stop ALL benefits until arrears are paid off. Can't meet rent or buy food? Maybe you should have thought of that before clocking up a few grand in arrears! £5 a week!?!? A joke.
Once they established themselves as a force to be reckoned with and messing them around is a one way ticket to painville, the majority will fall into line. Very few people evade tax because despite popular belief HMRC is actually very good at collecting taxes owed. We need the same for CMEC/CSA.