Well, see, if we grind down 8 billion people into a nourishing slurry with a shelf life of a century, that should be worth at least $1000 a person, with inflation. That's a 50% profit on your investment!

That's my question; presumably the people in charge of that much wealth aren't total fools and will be wanting to see some actual numbers and a business case as to how they will see a return, not just platitudes and enthusiasm.

That's how productivity growth is achieved, a smaller amount of workers do the same task.

Or course, the created wealth is again invested back eventually and new products/services require new jobs.

For example, right now we have some of the highest labor participation in years, despite rising productivity

Yes, think about how computers had multiplicative effect on productivity. The same may be possible with AI.