But this is just an emotional blackmail approach which tends not to end well. A child's interests are not financial alone and often the higher earning parent wants to make life changes after divorce to provide something more valuable to their child than money; time.
Certainly in my case, when I no longer had the shock of my ex-wife's reckless credit card spending to deal with every month, I realised I didn't need to do my London based, long commute high paid job anymore. I could maintain my lifestyle (albeit in a smaller home) with a local job and therefore be more present for the children.
That's often what arguments about money at the point of divorce are really all about. It's about lifestyle, not money. It's not that men like me don't want to pay for our children, it's that we are already fed up of being out the house from before 7am and after 7pm every day and never having any time for our children. Often at the point of divorce, we have wives trying to pin us down to that kind of routine because they either want to work in pissy little low paid part time jobs with minimal stress themselves or to not work at all.
Of course, the default reaction on this site and others is "oh, he doesn't want to provide" but that is nonsense. Normally, the real problem is the weaker financial party who refuses to be self sufficient and insists an ex burns themselves out to provide for them rather than do their share of the load.
This is also why the "similar lifestyle" argument is such a weak one. My ex-wife could have a similar lifestyle if she chose to work as much as me and she chooses not to. So she doesn't and no amount of emotional blackmail is going to make me hand over more than the legal minimum to her so that she can laze around in front of the TV whilst I'm at work.