Devils advocate time:
Some research says it costs more to have someone executed than living in a cell for life.
After someone commits a crime, do you not want them to differ for they have done? Let them be tortured by the idea of living their life in jail. Dont give them the easy way out by killing them.
But is there no greater punishment than death? An eye for an eye
But an eye for an eye makes the whole world blind.
points to ponder