The 1960s USA is the exception rather than the norm, and thus is not a good point of comparison. It's a peak of the very peculiar post-WW2 global economy where

The 1960s USA is the exception rather than the norm, and thus is not a good point of comparison. It's a peak of the very peculiar post-WW2 global economy where most other industrial countries had their economies destroyed and this gave the USA middle class a unique privileged opportunity enabling conditions that weren't possible almost anywhere else, weren't possible for USA before, and most likely won't be possible for USA or anyone else ever again. Working conditions becoming unlike USA 1960s are an inevitable regression back to the norm as the rest of the world recovered after WW2. Look at the conditions of USA 1920s-1930s (or perhaps UK 1960s, or all of the non-Western countries today) for comparison instead; the society has to function well in these working conditions (which are quite ordinary in both historical and current global context) instead of hoping that a return to the 1960s-USA model (which simply won't happen) would fix the problems.