> majority of population of any given country doesn't emigrate ever, even inside EU where it would be extremely easy
Because unlike the US, we don't speak the same language. If there would have been a real push to have a common EU language since its inception, we would have been more mobile and more US like. But no...
> Because unlike the US, we don't speak the same language.
The majority of Europeans, and especially those of recent generations speak incredibly good English.
Most Europeans speak 2–3 languages anyway, so there is always a common language to be found. No need for one to be forced on you.