I wouldn't compare European salaries with US so quickly. I have a cautionary tale to tell: when in 1990 the USSR collapsed, many Russian physicists decided to move abroad, some to western Europe, some to the USA. At first the European ones were complaining about their lower salaries, but once they started having kids and needing more medical care, they realized that they were actually much better off than their Ameri…
1, Public education is free in US. Of-course the quality varies depending on which school district you live. But in most metros (other than NYC/Bay area/north east) you will be able to buy a 4 bedroom house in a good school district for around $250k.
2, Healthcare - Health Insurance is paid by the company in almost 99% of the cases. Depending on the insurance plan sometime you will have some out of pocket costs (lke $20 copay per doctor visit etc).
3, Vacation - Most companies offer around 2 weeks of paid vacation a year (in addition to sick leaves). Yes its less than in europe but you can always take non paid vacation.
So the bottomline is US offers 2x the salary with 1/2 the cost of living and 3/4 the social benefits as Europe. If you do the math its better to work in IT in US compared to any part of the world.