If I am making widgets, someone has to buy them.
If no one has the money to buy them, I won’t be making widgets very long.
All previous models would no longer apply.
Initially larger numbers of workers would be required.
Howerever, the robots would begin to do more and more of The work.
Including menial labor.
At a certain point The vast majority of people are no longer needed.
The only “consumers” would be the wealthy.
The only “workers” would be a select highly trained and skilled engineers, computer scientist, and maintainance people.
Which brings me back to “what value would the overwhelming unskilled population have?”
In fact, they would be a burden.
Feeding and housing 8 billion people,who essentially are obsolete, and have very little to offer in a age of robots.
Perhaps some of them could be sex slaves or breaders?