Your perspective on egalitarian salaries is intriguing, but it's important to remember you can't speak for others regarding their intentions or their
whys, or what it is for them. You can't pretend to define that for someone who is not you.
While you argue it's naive and cite different tax systems and costs, companies are successfully adopting this approach even in high-cost areas like the Valley. It might be hard to argue that the world doesn't work like that in reality, given that it’s already happening.
While it may not be widespread, it doesn’t mean it’s without merit or unrealistic. After all, remember that today's 'unrealistic' could be tomorrow's norm! It's tempting to think that people in less expensive areas would be the main proponents of a uniform salary, but the reality is nuanced. Preferences are likely influenced by a variety of factors, not just cost of living.
Your later points about the differences between compensation at different company stages are well taken, however it could be difficult to assert how much this dynamic affects preferences given the practice is not limited to early stage companies and equity vests often fail to yield returns.
In addition, your suggestion that only people in poor places want egalitarian salaries, could be seen as disrespectful of other people, because it seems to ignores the totality of an individual while preferring to try to reduce them to simplistic motivations. In that way, it’s also considered abusive. And can also be seen as disrespectful of others experience, and maybe arrogant: "Only people in poor areas want such naive, unrealistic salaries."
Looking deeper, this aspect of your comment, combined with its narrow focus on a single explanation, might be interpreted as your attempt to express your personal frustrations at your own salary performance, or justify and rationalize why you may not be making more. This might occur because you may find it easier to view something you don't have as unrealistic and naive, rather than the result of choices you could change.
In short, while you mention that egalitarian salaries and enthusiastic support of them is naive and unrealistic, it could be argued that the view espoused in your comment is naive and unrealistic because: it lack awareness of complex dynamics; ignores the totality of an individual while preferring to try to reduce them to simplistic motivations, and dismisses real practices as unrealistic, which might also be seen as out of touch. Overall, your views unfortunately could be interpreted as narrow and an expression of personal frustration, instead of a reflection of underlying real dynamics.
To conclude, while it's likely there's some truth to the correlation you propose, it's also likely true that even if some correlation exists, location is not the only factor at play. People may have various salary preferences, independent of their location, just as the value they provide is also independent. Finally, indeed, your view could be expressed more respectfully of others.
Anywho, it's understandable you may have that perspective, given what your background might be. Yet it's always good to remember that you can adapt your view over time, can grow and can include more data to expand that awareness of reality which you value! :)