In my experience, in Europe also, it really depends on the country, how senior you are and whether what you do inside IT is in high demand or not.

A junior/mid-level level social media marketing person in, for example, the UK, isn't going to have the same de facto possibility to tell them "screw you" and quit, as a senior systems designer-developer in, say, Germany.

Mind you, even in the UK, if said junior/mid-level social media marketing person is a permanent employee, he or she will have way, WAY, WAY more legal rights than in the US.