Simply because he would be tortured more with disgusting prison food, be forced to work and count his days until natural death. I imagine someone would be more tortured because the mind can haunt itself and might even have memories and nightmares of the crimes they committed. She argues with me that the death penalty is not the easy way out, and yes, the food she gets from prison will be disgusting but she will still get food. If he gets sick, the medical commission will give him medicine. I highlight another fact: it is much more problematic to always impose the death penalty because it takes too much time with the court and jury, in addition to using the nation's money just to execute a criminal. If the criminal was rich, then all he would have to do is hire a great lawyer and have him fight the case, thus prolonging it to another day, postponing the death penalty.