> The vast majority of the world will fall into other categories, such as non-productivity or black markets. Not everyone wants to go build the next great app, folks!
The ratio of people who will find themselves something to do vs. people who will just veg and watch TV is unknown. You don't know and I don't know. Making an assumption either way is asinine, which is why we need things like this study.
Personally, I think we should introduce a small BI, gradually raise it until we find the sweet spot, then tie it to appropriate economic metrics, such as or median supplemental income. Ideally, this would be paired with a gradual reduction in the minimum wage so that number of economically viable jobs for those "idle hands and minds".
I am open to other suggestion for "What do you do with all of those idle hands and minds?", but you don't provide any. The only other solution I can see is to outlaw or limit automation.