This is a well-known concern in demography. See, for example, the Wikpedia page on dependency ratio: https://en.wikipedia.org/wiki/Dependency_ratio https://en.

This is a well-known concern in demography. See, for example, the Wikpedia page on dependency ratio: https://en.wikipedia.org/wiki/Dependency_ratio https://en.wikipedia.org/wiki/Dependency_ratio