> Very few people can do 40 hours of physical labor when they get to be 65 years old I don't believe, from what I've seen, this to be remotely true. Most (not

> Very few people can do 40 hours of physical labor when they get to be 65 years old I don't believe, from what I've seen, this to be remotely true. Most (not al) of the tradies & labourers I know in their 60s and 70s are very clearly more physically capable than most (not all) office workers i know in their 30s. I guess that's my experience against yours, with neither worth much. There's probably some real world data out there, though I suspect it would be incredibly geographically dependent. In my country (Aus) in little redneck towns like Bundaberg, you hardly see anyone in public who isn't obese, and they will largely be functionally disabled by the time they hit 50. OTOH middle-class hippies around my rural area are surfing, building houses, and running up and down hills at 80. Perhaps your perception of the capacities of older folk derives from living in disabling urban environments? None of this bears much on the question of whether people should be mandated to work at jobs they don't choose into their 60s and 70s. I personally think the main fruit of increased productivity should be liberation as far as possible from meaningless & unchosen activity, for all.