The salaries of CEOs of European corporations are nowhere near as extravagant as in the US, but still they're closer to 25-50x salary of a senior dev (quick googling returned salaries for European CEOs in the $3-6m range)

Depends on the size of company you are working for. I know for certain that most I’ve worked for didn’t have the budget to pay millions in salary to the CEO.

Though I guess the same limit would have applied in the US, I think the way people look at it is different.