On: 'Jonathan' is the oldest land animal on Earth

[Tade0]

Depends how it's done I guess. France has a decent population tower, for lack of a better expression:

https://www.populationpyramid.net/france/2026/

If they keep it up, their population will remain stable up to the 22nd century. There will be no further noticeable ageing and thus no threat to anyone's retirement.