1) Life without parole accomplishes this
No, it doesn't.
2) Capital punishment has not been found to deter crime
This is the single biggest fallacy in the entire position of those that oppose the death penalty. I told Doppleganger at lunch the other day, one of my favorite stories.
Robert Conrad (the actor that played James West in the TV show Wild, Wild West) was a guest on the Tonight Show about 20 years ago (Johnny Carson was still the host).
During the conversation with one of the other guests, the other person made the claim that the Death Penalty had been proven not to be a deterrent. Conrad's reply was both a classic, and to the point:
"Gary Gilmore hasn't killed anybody lately".
Side note for the younger members of RF (from Wikipedia):
Gary Mark Gilmore (
December 4,
1940 –
January 17,
1977) was an
American criminal who gained international notoriety, following two murders in Utah, for demanding that his death sentence be fulfilled (which Utah authorities had no intention of doing). He became the first person executed in the
United States after the
death penalty was reinstated in
1976 after
Gregg v. Georgia lifted the four-year moratorium instated by
Furman v. Georgia.
In summation, the Death Penalty is the ultimate deterrent. Now, if you are making the claim that it doesn't deter others, I will leave that open to debate. I have seen studies published, however, that reach the conclusion that it does, in fact, deter others from committing murder. Whether it does or not, though, is just a bonus.
3) I don't believe that the gov't should be involved in business of revenge
I do.
4) I don't like it either, but I find money a poor reason to kill someone.
If we were talking about a common criminal, I would agree. In this instance, though, we are talking about the those criminals that have demonstrated that they place no value on human life. Personally, I would spend the money that it would take to keep a serial killer on death row for a year, and put those resources into the health care of disenfranchised children.
I would rather spend that money on spaying and neutering stray cats and dogs than spend it to keep a serial killer alive.
But then, I have no compunction about putting these people to death.