> The issue that I see addressed less often is that the new jobs require by definition, a higher skill set. (You wouldn't displace 100 manual labor workers with a machine that requires 105 workers to maintain). So by definition, the average intelligence requirement for jobs increases over time (though never stated directly). This means that as time and technology progress, a growing percentage of people will have no jobs that they are capable of doing.

You might look up what economics has to say; this issue is well-addressed there. Some fundamentals:

The comment above assumes a static marketplace - the same technology, needs, etc. - and one that addresses the entirety of economic demand, rather than a dynamic market where those things change and resources are scarce (thus when resources become available, they are applied to other unfilled needs).

For example, which skills are in demand changes but there is still growing demand: If you look at the jobs performed 100 years ago, you'll see that most of them are no long needed. Yet not only are most people employed today, we have ~3-4x as many people - most of the jobs disappeared, yet, 3-4x people have jobs.

And yes, a growing economy requires higher-skilled work, but that's good because that work comes with higher pay.