Only rich people? So, the question is not only excluding the poor, but the middle class also?
No, I don’t think only rich people should have children, that is ridiculous. Let’s take the US, so you are saying maybe only the top 10% of the country (if that) in income should have children?
I don’t think income should have much to do with it except that I think parents should give some thought to their income and how many children they can afford. Middle and upper class people consider that usually, they plan how many children they will have considering many different things, not just income. The poor too often seem to not think those things through, but I am not saying the majority of poor people don’t think about, just that it is enough people that it is noticeable.
Back in the day when we were more of an agricultural country large families made sense the kids helped to work the farm, and there was usually food to go around. Now, in modern cities having so many children doesn’t make much sense, it is a burden on society and a burden on the parents themselves and the children. There are still rural communities of course, but specifically in urban areas large families don’t make much sense usually. Unless the people can afford it, then I am fine with it.
A close friend of mine had a priest who used to say things like it doesn’t how much you can provide for your kids financially, providing siblings enriches the family. He didn’t care if having 6 kids might mean only some could go to college, or none, because money was spent just raising more kids. He is still wanting women to pop out as many as they can. Not all Priests talk like this, I am just talking about this one. Not that everyone has to go to college, but maybe one or two of the 6 might want to.