France is clearly lacking of interesting jobs (SII) in IT, expect research maybe. Europe is also far from having a perfect society, but nothing is black or white, just gray.
I was working only few weeks ago in Hong-Kong for the biggest French bank in HFT and had a decent salary as a graduated. Hong-Kong follows the US style. I was asked to move to NY for 1XXk but finally opted for a life in Sweden for many other reasons. Anyway, I did my research about NY. With the 1XXk in NY, you must pay a 3000$ * 12 rent (36k) for a 40m², put 1/3 for a future retirement and in case of a terrible health problem (30k$). When you get children, you must pay everything by your own, like fees for 2 children = 15000$ * 2 (30k$). Plus you work 30% hours more, hence make 30% more per hour. Statistically, Americans are richer, so it must be interesting to move there especially when single. It highly depends on your life style and your expected work-life balance.