In the US, local and federal taxes plus property taxes are easily 50-60 percent of your income.
Inflation runs higher in NYC than the rest of the country, as well.
$300k is probably in the top 10-15% for software engineers if I had the guess. And I assume the top 10-15% in Paris is substantially more than 80k?
Edit: Okay, I guess $300k is near the median in SF if you’re including stock options. (Media base salary in SF is 150-160k)
I don't think that's a good assumption. 80k is rather high for Paris. That's a Google salary at their small office there (or it was when I checked a few years ago). I think the OP's comparison was pretty reasonable.
Of course, But 80k is on the high-end for Paris as well. And most companies in France, even in tech, except maybe the few international ones like FANGS or Datadog, explicitly want French speaking workers, whereas English is enough for most US jobs.
I'm EU citizen and looked towards working in France even for the lower wages, but the French language mandates are really off putting. I'm willing to learn the language, but I'd need at least 2-3 years.
But there are VERY few countries on this planet that actually saved for retirement.