According to the states guidlines, if the NCP earns more, so the CP gets more money from him.
What's so unreasonable about that?
My solution will not eliminate the problem, but will reduce it: The state will introduce a minimum payment, that will cover the state aid for the child. If the state aid is 500$, so the NCP needs to cover this amount. This act will reduce the numbers of the jailed NCP with imputed income that not exist in the real life.
That proposal has a number of massive flaws:
1. Some people can't even afford the state aid amount (picture, for example, a person who is handicapped and can't work). Making everyone pay the same amount is an undue burden on those who work at minimum wage or can't work
2. Some people SHOULD be paying more. You're suggesting that if Bill and Melinda Gates break up and she gets custody that he should be paying the same amount as a Walmart greeter. Sorry, but those kids have an entirely different lifestyle - and it's not fair to punish them because the parents break up
3. CS is for the child, not the parents. If you arbitrarily stop CS when a person is in jail, who's going to feed the kid? Sure, the state could step in, but that would provide only minimal sustenance - AND I don't like making the welfare state any stronger than it is.
4. Some people in jail can easily afford to pay their CS, so there's no reason to stop it. Granted, they will have to take it from their savings rather than from income, but that's just too bad - if they hadn't landed themselves in jail, they'd still have an income.