Some claim "primitive" people only needed 3-5 hours per day (https://wikipedia.org/wiki/Original_affluent_society), I expect perhaps less in times of great abundance. Leaving plenty of time for knapping - if that's what you want to do.

IMHO abundance solves itself, as population grows past carrying capacity, leading to famine, war, conquest and death. (The cycle being eventually broken by TV then reddit).

Division of labour is only necessary to create time in an economy detached from survival.