If an 80 year old no longer contributes to society, and all they have is pieces of paper indicating they used to contribute in the past, they are relying on people who do contribute (by fixing toilets, growing food whatever) to accept those pieces of paper. They will only do so if they feel they are getting enough of those pieces of paper, and if they will believe those pieces of paper will work in the future.
The health of that 80 year old is only relavent in terms of the amount of resources needed to move from the working class to the non-working class. The healther the aged, the fewer the resources. The higher the working:retired ratio, the fewer the resources.
What is to stop the adults under say 50 who have barely any capital at all (401ks, houses, shares, whatever) from saying "screw this, I'm off to $other_country where I don't live hand to mouth and have no future of retirement"
A country can not survive when 90% of its population are 80 years old, no matter how healthy or rich those people are, it means for every 10 hours an under-80 works, 9 hours is to produce goods and services for other people.
Goods and services do move across borders, though. A single country’s economy doesn’t exist in a sealed bottle. Those pieces of paper can be traded for foreign goods and services.
Now if the whole world was 90% elderly you might have a point.
The health of that 80 year old is only relavent in terms of the amount of resources needed to move from the working class to the non-working class. The healther the aged, the fewer the resources. The higher the working:retired ratio, the fewer the resources.
What is to stop the adults under say 50 who have barely any capital at all (401ks, houses, shares, whatever) from saying "screw this, I'm off to $other_country where I don't live hand to mouth and have no future of retirement"
A country can not survive when 90% of its population are 80 years old, no matter how healthy or rich those people are, it means for every 10 hours an under-80 works, 9 hours is to produce goods and services for other people.