In all seriousness, some sort of medium-term contraceptive solution until they actually want to make a contribution to society would be more workableI think that having children you can't afford to pay for is not fair on everyone else and most importantly not fair on the child.
Anyway, some sort of birth limit surely isn't a bad thing in general. Everyone harps on about green credentials these days. Surely the most environmentally friendly thing you can possibly do is to not have children?
Sadly whilst I agree with you on the points made, there are major human rights issues with this approach. Certain religions dont believe in contraception for a start and we seem to have an entire generation of retards in the form of chavs, hoodies, rude bois and wannabe gangsters who squirt kids out all over the country and can't pay for them.
If I was PM, I'd say have an IQ test and if you get below 100 (so average) you get steralised lol. Extremely right wing approach but would make sense to weed out the rubbish in society.