And productivity in society has gone up by huge amounts since the 1960s. Just since the 90s it's more than doubled, but going back to the 1960s it's much more than that. So you can't just say 'but population dropped'.

Fundamentally what is the purpose of society if the improvements it makes over time don't improve its's citizens lives? If even with tripling it's economic output it can't care for it's people (just because they are old doesn't make people not part of society)?