Children are complex and there is no simple way to raise them. Some children may respond better to harsher punishment, but generally not, for if children responded better to harsher punishment, they would not be in trouble frequently and thus harsher punishment would not be necessary. All children are different, but generally do not respond better to harsher punishment.
Children are highly individual and it is impossible to make an overall conclusion as to whether they might respond best to harsh punishment or leniency. While some children might fall right into line and turn into model citizens, others might resist harsh punishment and practice worse behavior. Some children can respond very well to the understanding and leniency of a gentler hand.