No there is “no reason to have this many people having children”... if you were designing a perfect utopian simulation.   Just saying “ no reason to have this many people have children” it sounds like some authority is choosing who has children. no one is “having people have children”.  People are choosing to have children for themselves. in reality, there doesn’t need to be a reason because human beings have a right to reproduce. They Always have. That’s how we got here. Now, do they have the right to the welfare they get because they were irresponsible and had too many kids? No, I don’t think they should.   But like, the right to have a child is about as fundamental a right as it gets, agency over ones own body, etc,..   I duno if you’re actually saying it should be that way , or jus saying, it would be ideal, in a perfect world if those people didn’t have kids. But I don’t think I’d ever say someone “shouldn’t be allowed” to reproduce.