EU is a failure and would be a disaster when crashes at least UK would be already out. The idea was good the intentions not so good, I believe in an economic bloc but not political, were aren't like US and will not work, too many languages and cultures and too many interests, the bigger countries always getting the front seat. The reason we have the electoral system in US is to protect the smaller states and we can see in EU would be no protection at all, if France and Germany decide to elect someone then they would win all the time. When the economy is bad the US federal government injects money in those states from money coming from richer states and what the EU did with Greece and Portugal showed to the Europeans the EU was made for the smaller states to buy goods from the bigger/richer states with loans from the same bigger/richer states to the point they are completely broken.
You can't have a purely economic bloc with no politics. Economics involving several countries by definition has a lot of politics at a purely economic level, then there's the collateral consider. It's all or nothing.