Re: One problem with these models
There are always more things we can buy. Obviously there's a limit, once we've mined all the available metal, but that's going to take a while. Then there are services. Personal shopping, troupes of 30 actors in a disused shopping centre who'll play zombies for a day for your stag do / corporate jolly to shoot paintballs at, fish pedicures, whatever.
If we've got more leisure time and cash, then we're likely to spend more cash on our leisure time - which then employs someone and so it goes round.
Automation has tended to change the jobs we do. And we're not going to have general purpose AI and general purpose robots for ages.