Which brings up another issue: manual jobs involve non-trivial amounts of physical risk. Not only does getting injured negativly affect your life you will always do better working than on disability. And I agree that it's possible for some people to own a business or or do office work, but not everyone who is a plumber today will be able to do that. There are fewer owners than workers.

I don't think we should discourage trades, but we can't sugar coat them either. I used to work as a mechanic and never met one that was 65 (the SS retirement age). The safety nets in place are optimized for people who work office jobs, not manual jobs.