American salaries are typically wildly higher, both on the low end and on the high end. It's often remote work. There are more jobs and more variety of jobs, on an absolute scale, than any particular locality. There may be more of a job ladder, and less stigma to wanting to climb it. There are some other cultural aspects as well.

I would love to see such options become available in Europe (insofar as additional options existing, not taking away the ones that already exist). But that would require some extremely successful European companies working to change it.