In Europe you often only get ~50-55% net and that's often from <$100k salary even at hot tech companies. But in many jurisdictions you then won't have any healthcare or education cost plus lower living cost overall. Pension is also taken care of in many countries. That probably still leaves you worse off than in the US but leads to a bit more even distribution of salaries across the population.
> you then won't have any healthcare or education costs
70 to 80% of healthcare plans are covered by US employers though. So maybe we should compare total comp plus benefits? Health plans aren't total costs, though, because cost sharing and care is expensive... But that means adding cost of living adjustments. But if you are using a chunk of your salary to plan for retirement in a lower COL area, maybe those aren't even fair.
An apples to apples comparison is incredibly difficult.