If punishment changes behavior, why does anyone get more than one speeding ticket? Why does recidivism exist at all?
Punishment primarily changes the visibility of behavior. Kids who get punished by their parents a lot learn to avoid their parents and hide their feelings and behaviors. To the parent it can look like the punishment worked.
If you were trown in jail, brutally raped and had 50% of your income confiscated for the rest of your life as a punishment, trust me, pretty much nobody would be speeding.
For most people, the (cost of punishment * chance of being caught) is less than reward of whatever they're doing.
Punishment primarily changes the visibility of behavior. Kids who get punished by their parents a lot learn to avoid their parents and hide their feelings and behaviors. To the parent it can look like the punishment worked.