https://www.iup.edu/archives/coal/unions-and-mining/the-coal...
https://iup.edu/archives/coal/unions-and-mining/the-windber-...
Even non-union protections directly by government like sick leave could be harder as businesses lobby that they can't afford to provide it at this time. (In my view, this pandemic shows we can't afford NOT to. But it's a debate to be had.)
I think people have a lot of control over how this goes, I'm not saying it's hopeless. Just saying that I don't think it's a naturally-occurring phenomenon. The Great Recession wasn't great for the labor movement.
I really truly hope all the light this pandemic sheds on huge systemic issues in this country are realized by the population at large and acted upon.
The sad state of healthcare in the US being the most obvious issues on the forefront, but also the decline of labor in general, rampant cronyism, and disgusting societal priorities/incentives favoring concentrated economic growth above all else. A vibrant economy is important but it's not the most important aspect of a society, not when it comes at a cost of physical/mental health and pitiful standards of living for massive portions of the population.
If Amazon’s the only game in town and Amazon workers go on strike, you have problems that can’t be resolved by competitors rushing in to fill the gaps.
To your direct point, this is why you organize entire industries within a given geography for service work rather than employer by employer. (It's also why there's been a big push over the last year towards sectoral bargaining.)
I can understand how those visions of the world felt fresh a few decades after the New Deal, Keynesian economics, etc. (especially due to big events like hyperinflation or the oil shock). These days though whenever I hear a neoliberal demagogue online saying that we need to press the gas pedal of the market to the floor and it feels so tone-deaf. I can't tell if it's my lack of experience or I'm looking at the progressive era and New Deal with rose-tinted glasses.