I feel like the most natural implementation would be something like vert.x for the jvm. They already have the mechanisms to handle async execution (via reactive extensions and futures and coroutines on top of the event bus) and serialization and distribution of data across a cluster. There are eventbus clients for many popular languages as well, so you'd be able to build your application in a mix of languages.
Yeah, you handwave some of the most visible and effective unions in the United States (SAG-AFTRA, WGA), you're also ignoring education unions, healthcare unions, and many other careers where pay is not just about seniority, but also education, certification, specialization, and other factors.
Even unions in industries with legitimately undifferentiated labor will have shift differentials built into their contracts.
> It keeps people employed, which generates other positive economic effects, like buying houses and groceries.
Let's be honest here. With that $50,000 trashcan we're paying mid-level managers $30, downstream suppliers $1, and $49,967 in stock buybacks that drive income inequality just so we can pay a factory worker $2 of that $50k. We are literally just shoveling tax dollars into the pockets of the already wealthy.
At the point at which your dogs have broken into and robbed your neighbor's house more often than they have prevented your house from being broken into; that's the point at which you can compare your dogs to the Air Marshal service.