I agree, BASIC meals, BASIC medical care, and a BASIC living arrangements (bed, toilet, shower) are all necessary. But, the luxury accommodations that many prisoners in the US get is ridiculous. I have known people who commit crimes just to go to prison because it is a better life on the inside than it is on the out. I am all for rehabilitating them, and providing reward systems for those who excel in the rehabilitation process. But the treatment they get is far too nice.
Now, in my mind, a murderer and/or a rapist has already given up their right to humane treatment when they committed such a heinous act against another human being.