There are so many ways this could be lying with statistics: 1) Healthier people work more - does this include the disabled? Having morbidly obese or disabled who earn little and live shorter lives will skew the stats. 2) Poorer people eat less healthily and have higher obesity, so the implications for policy are not straightforward 3) Smarter more educated people both earn more AND make better life choices, such as taking fewer dangerous drugs. There is a correlation between having the capability to manage a working career and manage your own life. 4) Those who engage in many unhealthy activities, such as alcoholism, will diminish their earnings capacity.

There are more, but that should be sufficient to breed some skepticism.

Earning power and longevity are interdependent variables. They are so closely tied that any correlation needs to be carefully examined.