First: Drivers obviously: 10 million people. Fast food: 3 million. Walmart: 1.4 million. Etc.
Secondly: offshoring (NAFTA and TPP) was never happening at the scale those treaties are indented to impart.
These two things could decimate the US workforce if they're not contained.
Now we'll see what happens when the consumer base is decimated too. Capitalist might have all of the infrastructure but no one can buy.
If computer systems do most of the thinking, and users don't understand how they work, I'm concerned that people will lose those cognitive skills. We're already seeing this happen with calculators (mental arithmetic) and satellite navigation systems (orienteering/navigation). Driving a car and learning a foreign language might be next.
Some, probably most, people will give up, while the rest will pursue the gradually dwindling number of things computers can't do.
So it could well be that most people, rather than the new Luddites who will try to keep the old skills alive, might never learn, because they don't need to.