I was thinking about Larry Ellison being 70 and still wanting to work and in fact, actually wanting to take a position where he can continue to be creative instead of one handling the day to day business.
At the same time, my Grandfather passed away last year at age ninety-one. He was weeks away from being ninety-two. When asked about how old he wanted to live, he responded, "My dad lived to be ninety-two, and I think that's a good age, so I want to be ninety-two."
Towards the end, he was being despondent and spent most of his days sleeping. There were times where he would be lucid and say some fantastic things, but for the most part, I could tell he was ready to go. He had lived a good life. Many of us in the family felt that he was due as he lived his last year in a nursing home and didn't really want to even do that.
I do think that quality of life should be included in decisions to prolong life. Terry Schaivo was a case where there was nearly zero potential to improve her life. Other times, I sense that some of these hospital administrations are doing what they can to bilk insurance companies in order to extend a person's life regardless of the eventuality of their passing. Not to sound completely inhumane, but if a person is going to continue their existence by suffering, are we being humane by prolonging their existence.
There are some cases, like with Stephen Hawking, where an individual wants so much to contribute to the world that they want to exist. Because of this, there should not be any hard limit put in as far as a person's life to which we should consider ending health care.