What do social contracts have to do with anything? I don't understand what you are saying; do you believe that resuscitation possible in the state of nature? If I perform CPR on someone it's because they are a nonverbal corpse-in-pending and I want to screw around with their heart, not because there's some kind of phony contract between us. It doesn't make a difference to me whether or not I know what's best for them; vegetables aren't people. My values override the values of any bag of meat that will otherwise never even be capable of conversing with me.