It's a standard argument to say 'I don't think it's fair to pay for other people's children / it's the parents' job to do that.'
Ok - well 'other people's children' are going to grow up to be our scientists, doctors, judges, police, firefighters, etc. etc. so a little investment in them as children benefits society as a whole - it is proven that properly fed children perform better in school.
Yes it's the parents' responsibility, but so is keeping them warm, safe, out of harm's way, and making sure they don't grow up to be violent thugs or drug addicts, but hey -
some parents can't or won't live up to the responsibilities that go with having children - are we really so selfish that we would deny children proper food because the cards have dealt them into feckless families?
I for one am delighted if my tax payer's money feeds children - and while we are about it, knock the cost of the next upgrade of nuclear weapons.