What you're responding to doesn't propose the abolition of obligatory work or private capital, it proposes a decrease in labor hours commensurate with, or conservative in comparison to, an expected increase in productivity
Gains from increases in productivity in the last hundred years[0] seem to be spread between more consumption, shorter working hours[1].
Some people expected that most gains would go towards decreased working hours instead of the spread we have actually seen. Not sure there's much significance behind that?
[0] Or any span of time you might want to pick.
[1] And bigger bureaucratic overheads, but you can count that either as a weird form of consumption or as just productivity not having increased quite as fast.
