I have a somewhat different theory:
I believe we work because it is necessary for our survival. Given our “druthers” we would play instead. So the goal of mankind is not to find work but to put work behind us and free up time for play.
This is no joke. Play can mean climbing Mt. Everest. It is to some folks while to others it is the worst kind of work. Then again, writing software is work for a lot people and to some, it is quite fun.
In the long run, mankind will work to eliminate human work. Let the machines do the work while we spend our time hiking around the Sierras and swimming at Malibu beach.
Caution: This may not happen in this century or the next but it is coming.
It seems to me that what you are describing is retirement.
I’ve worked, designing and operating nuclear power plants. I subsequently designed building automation systems.