similar to self-defense laws, you need to meet sadists with the perfect amount of suffering to reform them.  there's also the catharsis of revenge. i would have to interview some bereft families which were present for a death row inmate's execution to see how valuable torturous revenge is compared to a quick execution. i'm a proponent of "fates worse than death" for death row inmates which refuse to cooperate in solving their crimes (hidden corpses, methods, etc.). basically there should never be a point where your legal troubles "cap", like the waukesha christmas parade rammer who made a mockery of the court system for the duration of his trial. he should've been earning a death penalty, then each subsequent charge being a more gruesome death. i however think of these instances as deterrence and would much rather use the cheapest thusly minimizing suffering bullet.
Canada