Some sensible (IMHO) responses:
> US Americans are somewhat less likely to feel solidarity or a sense of common cause with coworkers, and more likely to value the freedom to negotiate their contract on their own.
No one is negotiating their contracts on their own. A negotiation requires at least two parties, and when it comes to negotiating employment terms, one party typically had no problem incorporating and using that to their advantage.
> They are also much more likely to distrust large organizations and bureaucracy, sometimes to an extreme extent that would be puzzling to Western and Northern Europeans.
Yet some of the largest and most powerful organizations in the world are US based. For a place where so many buy their food at large restaurant and store chains, buy their internet and phone plans from large national service providers, trust large organizations like Google or Facebook with information about their browsing and communication habits and depend on large credit organizations and banks, this just doesn't strike me as true. Large, bureaucratic organizations thrive in the US and people love them. Maybe not meaningfully more than in European countries and probably even less, but to call it an extreme distrust is a mischaracterization IMO.
> Third, there are many current examples of unions in the US that have made industries meaningfully less efficient.
IMO this is an important point, but in a country with the GDP per capita of the US I think that there is some margin to improve conditions in a lot of industries, of course at the expense of some very rich people. The problem is that consumers cover that margin instead of shareholders.