You really going to mention all that, which had some impact on the US middle class, but you're not going to mention anything about the US "wealth distribution" dynamics which has had its regulations and protections removed to the demise of the middle class?? Income tax roof being more than double before, corps being taxed more than double, the top earner vs bottom earner of any corporation much closer.. Less workarounds, no-one using the stupid "buy-borrow-die" strategy that is all too common now..

That's just the byproduct of the rest of the world coming back online (plus communications & logistics improving).

Look, if you own a company, or are in a leadership position: the entire world is now open to you, both as source of labor and as potential market. The impact of your decisions has exploded, and the potential revenue and value of your company has also exploded.

OTOH, if you're a line-worker at a factory in Detroit: your competition is now most of the population of the world--and they all expect lower salaries than you do.

What's your argument for why you should keep making 10x or 20x what people in China or India make? Do you just naturally deserve it? Do you figure that companies owe it to you because you share a home country? If so, either the company will bounce and move abroad to one of the many countries willing to welcome them with open arms--or they'll be swiftly replaced by a Chinese equivalent which has 1/10th the labor costs. Either way, your extravagant salary is going to dry up.

American labor in the 50s was simply in the right place at the right time. That's no longer true. There's no way to stop the rest of the world from growing and improving in order to maintain the special status of the American worker. They don't really have a choice: they need to skill up. And yes, push for better social safety nets, though their instinct seems to be in the opposite direction.