No, I'd rather we raise the basic income for every adult enough to the point where the adult can support themselves and ONE (1) child at least for bare necessities like food and shelter.

For what it is worth, I don't think anyone sane would have kids to get money. In fact, you couldn't pay me to have children and raise them. I know what a shitty brat I've been and I'm sure if God or karma exists, I'll get an equally shitty child or worse I'll make a very shitty parent. (Parents: yes, people without kids also have nightmares about fucking up as parents)

Thankfully though many if not most people want children even though it makes no sense. This is good for me because these are the kids who will build and maintain roads, hospitals, and electric lines when our generation can no longer walk without a cane.

I don't think we need to encourage people to have many children. Those who want multiple children should find alternate ways to fund their lifestyle.

Edit: I assume above that basic healthcare for everyone exists with $0 out of pocket even if it is some couple's 99th child.