You can get a life expectancy of 100 by putting all your senior citizens (who are much more susceptible to infections, broken bones, etc) on IV nutrition in iro

You can get a life expectancy of 100 by putting all your senior citizens (who are much more susceptible to infections, broken bones, etc) on IV nutrition in iron lungs in an intensive care wing. That would be awful. Better to measure quality-adjusted life-years, in a way that accounts for the fact that it's sometimes better to take a risk of death with a possibility of full recovery over a guarantee of lost function. I can't possibly enumerate all possible metrics and their effects, but I bet we could do pretty well at imagining faults for anything that can be constructed.