[ctdonath]

Marx didn't consider how capitalism, coupled with a lack of a satiating supply of survival staples (aka today "guaranteed basic income" aka welfare entitlements), necessitates raising the accepted standard of living and thus creating a renewing demand for labor (mundane included). Most of humanity past did not enjoy what we now consider poverty-level baseline necessities, much of which exist thanks to jobs of all kinds both creating and buying those products & services. He never dreamed of the poor needing & owning cell phones, indoor running hot drinking water, a/c, a car for every adult, TV, etc.

[throwawaykeno]

Actually, Marx foresaw exactly "a renewing demand for labor" (although foresaw is kind of the wrong word; directly observed would be more accurate.) See "Capital".

He also foresaw the shift from manual labor to intellectual property as the essential component in production.