For instance, 60k in some areas of the USA means you are living like a king, have acres of land, a lake, multple cars, etc. That same amount in NYC probably makes you homeless.
Whenever I go to the US it's shopping time. Pretty much everything is cheaper. And many items you just can't get elsewhere (which is another aspect many ignore).
I know this is going to be controversial, but healthcare-wise high earners might be better-off in the US too. Generally it would seem to me, the more money you make the better US is in comparison.
Believe it or not, I'm only saving 3 dollars an hour of my pay. That's about $6300 a year because I work about 2100 hours.
If you account for commuting time and emotional/physical toll of working, I'd say it's nearly negative pay.
Saving money isn't just about making more money, but just as much as cutting expenses.
They aren't very informative when you don't take into account the differences in local/state/national tax rates, purchasing power, cost of living, etc.
You need so much more information to get a decent picture of how much better or worse a job offer is relative to what you currently are getting.