You don't have to watch the news to see it. Kids back talking their parents in public and the parents do nothing about it. We saw it the other night when we went out to eat and mom with her two little shit's running all over the place. Kids can pick up on the fact that all mom is going to do is repeatedly say I am not going to tell you again or This is your last warning. If all we did was put up signs to enforce traffic laws without actual police or fines to enforce the laws, you think more people will break the laws? I can't put all the blame on the parents. We are basically making it so disciplining your child can land you in jail.
Happened plenty when we got paddled in school too, talkback and disrespect that is but it's normal thing for kids to do. Violence to discipline violence does nothing to prevent it. You have to get through into their head, some are easier than others but since when did getting the switch, belt, paddle or hours of sitting in an empty room prevent children from misbehaving?...oh it didn't, that's why so many of us got spanked a lot. Overall though, the point is that most kids are just normal kids and will grow up into normal adults whether they were disciplined much or not. Our society is not decaying, it's just different. Every decade seems to be different but remember that spanking your kid does more for you than it does you child, it's a cheap, easy and quick way to deal with your annoyance. It's harder to actually sit down with them and talk and actually spend more time with them.
If harsh punishment actually worked, then all the abused kids who got hammered with dad's fist would grow up to be the most obedient, kindest person you ever knew but often they turn out to be criminals and abusers themselves.
If you ever got paddled more than once, then obviously it doesn't work. Everyone is different. I'm not against paddling or the belt, it's really more of a straighten up this minute kind of thing but does nothing to actually alter the child's behavior, all it does is make them cry and whine loudly as to annoy everyone to death.