

Most, sure, but Europe, Korea, Japan, Singapore, Australia, New Zealand and more are still a significant part of the world where $1M puts you firmly in the same “well-off and comfortable, but certainly not rich in the way billionaires are” territory you’d be in the US
Worldwide, I think it’s definitely safe to say most millionaires’ lifestyles are much closer to average than they are to billionaires’ (ie still having to make regular payments for housing, but mortgage rather than rent, and still having to perform most tasks for themselves rather than having PAs to do it for them)
The $1m isn’t in cash… You forget that the average house price in London is around $900k, and for Sydney it’s $981k.
That means your pool for your car, furnishings, investments etc. are either minimal, or you have a mortgage, and definitely can’t live passively off $30-40k per year unless you’re living in cheaper than average housing (one would call this “not super wealthy”) and definitely not if you’re supporting a family.
I’m not saying the cost of living isn’t worse in the US, just that $1m is a comparatively tiny amount everywhere and that most millionaires (as there will a correlation between net worth and frequency) are frankly closer to the working class than they are to billionaires.