If a tally was done at the point a child finally and properly leaves home and gets their own place, I would be fairly certain thst even the most generous of maintenance payers would still not have paid more than the Resident parent.
On the surface I have s very generous payment each month from my ex, which covers mortgage and utilities in the house I share with the children. However, there are so many ridiculous small and not so small payments which occur almost daily which people don't take into account when assessing that the RP is getting a good deal; every time the child is invited to a birthday party, every time school requires a costume for the play/world book day, every summer soccer camp, Tae kwo do lesson, Cubs fees, and on and on....
If my ex gave me £100 for the kids and I spent it on a new handbag, then the £100 of my own money I'd have used to treat myself would be spent on the children many times over, so it's all swings and roundabouts.
The house has a pot of money and the RP decides where it's best spent. And as previously said, I would bet that the RP rarely 'makes' on the deal, and will end up paying more over the child's lifetime. And that's just financially, it doesn't take into account the physical and emotional extra they put into the child's upbringing.
Any father who is happy to get away with paying the minimum, who does clever things with tax to avoid showing as having a wage (all those rich business owners 'paying themselves' £20k a year to avoid maintenance), or who arent fighting every day of their lives to see their children if access is denied, are a shower of shit.
If they gripe about the cost it would be to go through the courts but then still ever have holidays, a nice car, nights out or expensive clothes then it's very clear that their priority isn't their children, regardless of their feelings for the mother. I would go into debt ten times over to fight through the courts and never have a moments rest if I was denied access to my children. More so if I thought the RP wasn't a good parent. I'd never let it rest, then I could look my child in the face when the time came and know I did everything I could.