Of course the problem with this is that only rich people can then have children. Whilst I don't see the attraction of breeding many people seem to place a lot of importance on it and I can't see it's right to go out of your way to make it hard.
There was a brief golden age when both parents working actually meant you had more cash to spend, before two wages became the norm and the cost of living rose accordingly. Now both parents have to work (it's not a choice), the cost of childcare has gone through the roof since they brought in all the qulification requirements, and you end up in the position where you would be better off on benefits - the cost of childcare plus commuting eats up a couple hundred quid a week before you start.