But the difference is the US is a political union and the EU is not. In fact truthfully the EU is flawed as the 'freedom of movement' implies political union,

But the difference is the US is a political union and the EU is not. In fact truthfully the EU is flawed as the 'freedom of movement' implies political union, which it is not. And this is what has lead to brexit. The euro is flawed[1] for similar reasons. The economies of southern Europe are too different and its impossible to adjust as the flow of labour is limited due to cultural and language difficulties. [1] http://krugman.blogs.nytimes.com/2012/06/24/revenge-of-the-optimum-currency-area/ http://krugman.blogs.nytimes.com/2012/06/24/revenge-of-the-o...