As far as I know, welfare laws in spirit is only "transitional", please anyone with experience in this field add to this, I understand that there are circumstances that mitigate or factors in such as IE: Death of a parent, living a widow in economical distress, but on the other hand we have plenty of irresponsible people who just are baby factories.
I will refer to the latter ones, and it is usually lack of education combined with a sistemic abuse of the system that worries some in here.
Are you saying that if you are having 2 or more kids and are not able to feed a single one of them, is ok for the rest of society, (and most importantly the life condition to the kid's right to have a good home) to pay for the excesses of few?
Perhaps a license to be parent should be issued, just like a drivers license, after attending courses.