Earlier quoted context omitted.
> considers themselves 'middle class' They don't consider themselves middle class, statistically they are middle class based on (income, wealth, purchasing power, etc.). They aren't out of touch - nobody asked them - they just live where there's a higher cost of living. But it pays off, or they would move someplace less expensive, and housing would cost the same nationwide.
They are not middle class by any metric. They may feel overextended, but that can happen at any income level, and (as in this case) is often due to the spending side of the equation.
The average US locality's economy produces more wealth and requires more expense to live in than the average locality in a low-income country. You can't just move the Americans to the low-income country; they wouldn't be nearly as productive, and thus have less income. NYC's economy is more productive than almost any place in the world.
We could widen the scope to all of human history, and then we're all unimaginably wealthy compared to hunter-gatherers we were until 10K years ago. But does that mean we're just as wealthy here and now?