I, and a lot of other people, don’t like this thought process. We are quite bad at estimating how much someone has left to live. We are worse at estimating the quality of the life someone will experience. And then that someone may be single, with no family, or have 3 kids still in elementary school. Are you going to consider the quality of life of their dependents. What if that person is about to solve the nuclear fusion, or the Riemann hypothesis, would you pay 1M to keep them alive one more year? Would you let them die after their work is done?