We have 250 years of data from fast productivity increases since the industrial revolution started.

The empirical experience is very clearly the opposite!

I'm talking about the exact job in isolation. Obviously other opportunities arise and people will find work.

Looking to the past, we can look at how industrialization has greatly reduced the amount of human labor in agriculture.

What do they call it when a market increases demand for a resource in response to increased efficiency of exploitation?

Jevan's Paradox

So will the workers get shorter days, or more paid time off? :)

Presumably some would have full time off.