After half the jobs are being done by the owner's slave humanoid robots that double as the owner's personal defense force in the event of revolution, further entrenching their power beyond owning the means of production, means of propaganda, means of state violence, and their captured state and federal governments they already have?
When?
(note, automation isn't the enemy, robot laborers aren't the enemy. such technology should be used to free humanity from unfulfilling labor. The enemies are those who would use such technology to, as ever, further enrich and empower themselves and their capital market buddies exclusively, while hurting everyone economically below them because they can.)