Plain and simple, parents and programs that posses no real skills in the art of human relationships resort to austere, harsh, excessive, and abusive punishment. They just want their discomfort to stop. Any means to that end looks like 'success'.
Spare the punishment and spoil the child. Will this paradigm ever cease to exist?
Probably not, because to do anything else, requires one to invest time and energy into learning something different. To learn that respect begets respect. Anything else is not genuine respect. To learn that children are absolutely the product of their conditioning. You got a 'manipulative' child? Odds are extremely high that you or someone very close to them modeled manipulation.
Punishment, humiliation, shame, blame, guilt, coercive manimpulation, corporal punishment, jail/prison has never solved any of society's ills or family problems.
Send the kids to grandma and put the parents in a parenting gulag.