I used to think that it was a balance, what I paid in NI I used to get back in child benefit. I used to use ours to fund start-rites, and watch it mount up in the Post Office account (rural PO needed the business) so I could buy ds decent shoes for school. We are fortunate that we don't rely on it, but as I am now a SAHM abroad, I still claim UK child benefit rather than the Belgian one (which pays more) as I'd rather get my HRP (explained earlier on the thread) credited to my pension. What is not now realised is that the rules have changed, and HRP won't be paid/credited once your child has reached 14, so I'll have to start making payments to bring my pension contributions up to the limit.
Before I'm flamed, I'm abroad with the UK Armed Forces, so even if I did work here, any NI equivalent I paid would go into the Belgian system, and not be credited to the UK. Yes, I do access the Belgian hospital system, but that is paid back to the Belgian authorities by the MOD, and no, I don't use the Belgian education system.
Pru - what happens if you remain a childless person all your life? Should you effectively subsidise other peoples' choices? Agreed, it would be great to give mums of under 5s more child benefit (family allowance my Mum used to call it) but some will get sick of paying in and never getting back. If the govt got rid of some of their quangos, then they could afford to do it perhaps.