I think breakfast clubs are a great idea, if parents have to go to work then children are not always ready to eat, later however they are, and at least at a school they can offer good nutrition whereas at home grab something quick can mean empty calories.
Re working mums or dad, Its not always natural to be a good parent at all, so, with nursery, and help re things like Tax credit the child can have a slightly better chance of getting a good start, I know just how expensive a nursery is, I have done nanny work and everything re child care....I must add, just because you are a parent does not make you good.
The last point, like others have said, its not a new thing but it seems more common, as is divorce or split families, and laws of who looks after your child do not always help either.
Maybe soaps and TV programmes are a good way of education parents and people re food, I know they tackle some interesting things and I think more people take notice.
When I worked with disabled family's, support groups offered loads of help re child care and so did parenting classes...not a bad idea....Oh and I forgot, anyone who rings social services with a concern will have it investigated, I know as I have taken my turn on the phones, anyway, most of the complaints will be sorted quickly and the child kept an eye on, But, there are so so many children at risk, priority is getting to the more serious cases of neglect and abuse and like everything else, there are not the funds!!