That's precisely what I am also saying. If a law is gonna go out to state the number of kids to be had by a parent. Then that's good is they will also determine how much to spend on a child, and if those parents are qualified both mentally and adequately furnished to nourish their kids.
Like you said, it is better not to bring forth at all if you don't have plans to keep them. Parent and society which includes the Govt are all hands in hands in the training of a child.
If they don't have what it takes and they bring them here, will there be laws to charge such people.
From my part of the world I don't see how that is going to work.
However, my claim is, when it comes to over population, we need to actually balance it because it is a relative term. Overpopulation is relative to the resources available or something else that belongs to all.
Of course, my friend. And overpopulation is not the central issue here, because it's not the only thing that can influence the future of children.
In my country, at least, a child is unlikely to be taken away from an irresponsible parent, unless the parent seriously injures the child. Which is unfortunate, that it has to get to that point for society to react.