"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."

Until the black death came in the 1300's and killed an estimated 30–60% of Europe's population, and now the nobility had nobody to rent seek or even to work their land.

So then, for the first time ever, the surviving workers gained bargaining power as landowners (lords) competed for labor, leading to high cash wages, better working conditions, and more freedom for peasants, because the feudal lords hadn't yet figured out how to replace the peasants with slaves, H1-Bs and illegals from across the planet.

So according to history, including your post-WW1 example, the only times peasants gained bargaining power was when millions of them died through world wars and global pestilence.

Looking at recent unfolding history, "There's something very familiar about all this" -Biff Tannen

It didn't just "lose", it killed millions of its own people in the process. Having been born in a communist state, I'd rather clean toilets in American than do anything else in the USSR.

Edit: It's basically impossible to communicate the day-to-day misery and deprivation of late stage Communism without sounding like a crazy person. My parents were both university-educated professionals but we lived in a tiny, one-bedroom apartment with occasional hot running water and only newspaper for wiping after the bathroom. This was considered a rather affluent existence.

To find something similar in today's America you'd have to go to the worst, most impoverished parts of town and even then...