I agree historically, but your points break down when the threat of revolutions no longer have the physical or economic power they once did.

Good luck violently kidnapping the family members of a AI CEO in a world of flock cameras and humanoid robot patrol units.

And good luck withholding your labour when 80% of people can't even find paid employment.

Also, arguably if the unemployed masses are going to try to overthrow those provide them with at least the basics to survive and part take in a revolution, then those involved in the revolution shouldn't be surprised if what little they have is withdrawn. Strategically this sounds a lot of like punching your boss and demanding he pays you more or you'll punch him again. This isn't a reasonable negotiation tactic unless you hold some of the cards. The only reason threatening to quit a job can sometimes work is when it's a real threat of economic harm, absent that, it's just annoying and they'll probably be happy to see you off the payroll.