As I thought, you don't have an answer. Seems this type of family are the exception as most people do only have what they can afford. Chances are she gets pissed and ends up pregnant. Cannot make rational decisions when pissed.
Exactly what do you propose? Are you saying that someone on benefits, after having two kids, should be sterilised because other than that, how do you stop irresponsible people from having kids! You could move them into foster care but that costs money and would mean splitting up siblings...
Add to that the fact they have no crime and poverty doesn't exist it is surely the best society to live in!!!! (just make sure that you don't lose your job or get ill and you'll be fine).
The most intriguing fact to come out is that Carlzeiss reads the daily mail!!!!!!!!!!!!!!!!
As for all those muppets banging on about why this is what's wrong with the benefits system you're all a joke. This story represents a very very small minority, I for one don't know of any family on...