Technology is now destroying more jobs than it creates
businessinsider.com
businessinsider.com
So far there is no end in sight for human wants and needs and so there is no sign that demand will stop at a point that creates the mass unemployment envisioned. Income inequality is the big issues.
This is exactly the point.
There will probably be markets that don't support more growth, like agriculture, so lesser people will work there.
But if a company suddenly can produce the same with 50% of the workforce and the marked still has place to grow, they will simply produce 200% and keep their employees.
But the real problem is, what happens when the vast majority of people can't offer any kind of labor or service that a machine can't do quicker and better. Will we need a second economy? (As the medieval church once was.) Will we prepare for this eventuality or just blunder into it?
How do we set a value to things and services, since some resources will still be limited? For example we won't all be able to travel as much as we want.
Some jobs will still exists and will take a long time before they can be replaced by robots. Some will be desirable, we can share those more so people don't have to work as much, but some won't. How are we going to chose who does those jobs?
If there is not enough work for everybody, and a lot of tasks are covered by robot, we end up in a sharing economy. How do you assign value in a sharing economy?