“All environmental problems become harder — and ultimately impossible — to solve with ever more people.”
David Attenborough
Personally I don't see why people who have kids should have them subsidised at every turn. In the UK you already get government payments for the kids. Where I live transport is also free (and prices for adult tickets are soaring). There's even free swimming (and again, adult tickets are ridiculouse). Basically you choose not to use contraception, that's your choice and maybe you ought to be prepared for the costs involved.
Personally I'd keep the government payments, but for a maximum of 2 kids. And no more freebies on the taxpayer. If businesses find it pays to make kids cheaper, then that's their choice. But I think there's a real irony if zoos are subsidising kids, when less kids means more space for endagered animals in the future.