I'm afraid you're right. The problem is with our society as a whole, and that includes trendy lefty-liberal teachers, who themselves are a product of modern society.The parents won't allow it and nor will their solicitors.Fair enough. Should we go back to the good old days when teachers were able to discipline a child with a slipper, the cane, maybe a punch, the chair, ball-pane hammer or anything else that came to hand.
The government is attempting to rectify the situation by giving 'problem schools' (read problem children and parents) the title of 'academy' and throwing lots of money at them. In some cases, there may be some superficial improvements, but the root cause - a sick society - remains, all supported by no-win, no-fee lawyers of course.
At the risk of sounding pessimistic, I really don't hold out much hope for improvement in the long term. Changing society back to what it was in, say, the 1950s is almost certainly impossible.
There will always be 'good' and 'bad' in society. If you are lucky enough to live in a 'good' area, the effects of 'the bad' are likely to bypass you. Bearing in mind that politicians, judges and the like invariably live in 'good' areas, there is little wonder that there is no political will to change things.