> There is no economic system that is sustainable where there are more elderly people not working / unable to work than there are young people who do work. I d

> There is no economic system that is sustainable where there are more elderly people not working / unable to work than there are young people who do work. I don't think this is true. At the micro-economic level, it's not outlandish to see households where a working generation sustains not only their kids, but also their parents. At a macro-economic level, we'd certainly have to adjust our expectations of profits and growth, but that's because we are used to an always-growing economy.