For what it's worth, these jobs do exist in Europe as well (I'm slacking off at a 100k+ € swe job in central europe right now!). I had high paying offers from the US in the past, but in my opinion the higher overall living standards, smaller wage gaps, and better social/political structures more than outweigh potential earning benefits.
In any case: If you're willing to move, consider eg Zurich, where a lot of big, high paying companies (google, FB, ibm, Oracle, apple, ... ) are hiring. Very high standard of living, very low taxes. London is similarly plastered with high paying jobs. Berlin has tons of interesting startups. Paris is great and has good food. Last time I was job hunting, I got high paying offers in all of those cities, so it is definitely possible
I do feel London is somewhat underrated in this discussion, for a senior Rails position I find quite a few startups willing to pay 80-85 GBP, that's not that far off from the U.S if you factor in cost of living. But yes - Belgium, France and Germany don't offer this type of money.
In any case: If you're willing to move, consider eg Zurich, where a lot of big, high paying companies (google, FB, ibm, Oracle, apple, ... ) are hiring. Very high standard of living, very low taxes. London is similarly plastered with high paying jobs. Berlin has tons of interesting startups. Paris is great and has good food. Last time I was job hunting, I got high paying offers in all of those cities, so it is definitely possible