I think the argument is that technology is great for the people who use technology.
If every programmer and engineer got paid $500,000/yr, that would be great...for ever programmer or engineer, it wouldn't matter much for others.
I do tech support for a web hosting company and I've definitely seen people with low incomes who don't and don't want to use technology, they are falling behind.
Is this view at odds with mainstream economists?
I believe the mainstream view is that technological progress is a tide that should naturally lift all boats.