What’s far less dense with better public transit than NYC? The most popular example of no-car city design I see is Amsterdam, which is 1/2 the density of NYC, but still 15x the density of where I’m from (not even close to a rural area). I think robust public transit at 1/15th the density of Amsterdam and 1/30th the density of NYC is a pipe dream.
In these lower density places, maybe you luck out and you’re walking or biking distance to work. If you change jobs do you have to move instead of hopping in the car and commuting a bit further? In circumstances like these, transit can’t possibly serve every origin and destination efficiently, and personal vehicles can offer efficient point to point.
It’s worth noting that Americans also must spend that income in a similarly-inflated market, so it doesn’t much matter what their salary would be worth in, say, Uganda. I think any such comparison of global wealth runs into these sorts of issues.
Someone earning in the global top 10% may not be able to afford a house locally. Someone earning in the top 30% may not be able to afford rent and food at the same time in their locale. It makes the percentile meaningless.