I propose we starve to death all our death row inmates!!
How about this? We starve the death row inmates for about 4 days. Then we put a plate of their favorite food in the room but tell them it is poisoned with cyanide. We put a TV camera in the room and make some real reality TV. There are all kinds of variations. Don't poison the first batch, but poison the second, etc.
I supposed that is cruel and unusual, but it sounds fun!