Schools certainly have a duty of care towards their pupils, but before I retired from my teaching post I was seeing parents (and the Scottish Government) expecting the schools to do more and more parenting.
We'd see pupils coming into school on a Monday morning saying "My mum says that the school nurse has to fix it..." It would turn out that the child had taken a tumble on the Saturday and no one had cleaned and dressed the wound.
We didn't actually have a school nurse - only Pupil Support Assistants with a first aid certificate.
Then there are the pupils who have not been taught table manners, toilet trained, etc to the extent that the Scottish Government has decreed that schools should "support" parents in toilet training their children - and no, I'm not talking about children with additional learning needs.
I've said elsewhere on these boards that my late husband was dismayed by his young grandchild's lack of table manners - using her hands instead of cutlery, eating sweets at the table, coughing over other people's food, etc.
Her parents seemed to think that all this was charming. She eventually attended a private school, courtesy of DH's daughter's work, and the parents used to gush about the fact that the grandchild had been taught "beautiful manners". It didn't go down well when my husband asked "Is that not your job?"
Latterly, I was aware of more and more parents giving the schools a phone number which was switched off during school hours, precisely so that we couldn't contact them. I do have sympathy for parents who were worried about antagonising their bosses by taking calls at work, but there were those who clearly took the "S/he's your problem now!" attitude. I've even seen a Scottish comedian joking about this online.
Not all parents, of course, but a significant number - and yes, they included middle-class parents.