Nothing to stop people having kids, we have no laws against it, so anyone can have as many as they want, working or not. Legally. If you don't like it, blame the laws the politicians make, not the general public.

You also forget that we are a religious country, and tens of thousands believe it not using contraception, as well as pregnancy being a gift from God. So do we ban religion? Do we make it unlawful for people who are out of work not to have babies? How far do we go before we become North Korea?