Earlier quoted context omitted.
The longer someone lives, the more potential value they can contribute to a society. The opportunity cost is something we've figured out from a medical perspective, but shareholders want returns today, not returns fifty years from now. That is what we need to address.
>The longer someone lives, the more potential value they can contribute to a society. This is questionable. Highly populous countries have worse living conditions than moderately populous ones, currently.
https://ourworldindata.org/grapher/population-density-vs-pro...
There does not look to be a strong correlation between population density and income, at least on a log-log scale across countries. But I would guess that these numbers hide a trend for cities to be richer than rural areas (subsistence farming etc).