I didn't mention it because other than medical care as being a major factor in longevity, the other factors aren't nearly as clear cut as you make them out to be. Education appears to be a factor, but it's clear that education alone isn't the cause for longevity, as blacks and Latinos without high school educations have a longer life expectancy than those with higher educations. White women without a high school diploma have a shorter life expectancy than those with a high school or college diploma, but only those white women with no diploma who smoke and do not have a job, with having a job having more of an effect on life expectancy than quitting smoking does for that group. There are far too many factors than can simply be pointed to as "can afford better than average, so we have to give everyone free healthcare, free educations and free healthy breakfasts, lunches and dinners because they'll live as long as rich people do if we do that." It's just not that simple.
I don't think living longer is as good as living stronger: quality over quantity.