“Surely, if you have children, it is your responsibility to feed them.”
Agree completely and also hear what Clives saying, some kids would otherwise go without a hot meal due to irresponsible parents, or poverty.
My beef is the fact it's another scheme (like the former healthy eating bonus for pregnant women) that isn't means tested, so becomes another massively expensive benefit the country has to shoulder, which after recent years was what I thought got us into this financial mess in the first place.
I've read other counter arguments that is more expensive to set up the wheels of bureaucracy to enable means testing, in other words it would cost more and goes to fewer people. I'm not convinced with that argument, and sure in this technological database world we live in, there is an efficient way of doing it!
As Kempres says, in the old days entitled kids got a meal ticket.
If a family is genuinely on benefits for whatever reason, then issue them with school dinner vouchers for their kids and a Supermarket voucher for the family shop, which can only be exchanged for fresh produce, not ready meals snacks or alcohol 
Long time no see Pamela, great to have you back 