Wealth per se has nothing to do with longevity, as a minute's thought will make plain. What wealth does do is enable certain things that help with longevity, such as better medical care. If you're using wealth as a measure, you need to realize that it's only a proxy, and you'll get better data by looking at the actual behaviors that it's a proxy for.
> such as better medical care
Better food, comes first
Such a strange comment. Wealth has nothing to do with longevity and yet here's all the ways how wealth CAUSES longevity.
Basically a good point. Merely never ending up in situations where it's a struggle to make ends meet has a huge impact on stress though. You often don't even have to use the wealth in order to benefit with respect to stress.