Three Strikes?

An official said a soldier was convicted in the U.S. military justice system of killing a prisoner by hitting him with a rock, and was reduced in rank to private and thrown out of the service but did not serve any jail time.
(Article)
Perhaps President Bush could embrace this within the US too, as a tough, but humane alternative to the death penalty. If you kill someone with a rock, you lose your job AND get a negative job-reference.
Of course, that would only be for the first offense.