I think you are a bit confused. The EU (United States of Europe) is ONE economy with ONE currency - the Euro.
Nope. Not even close. The Eurozone excludes important economies, such as the UK. So their poor state doesn't have anything to do with the Euro per se.
Now it's not surprising that an american would see the EU as a US style federation, but it's anything but. Far from it. All the member states retain their full freedom, the limits of which are only voluntarily agreed to by convention. Hence the Euro was as doomed as all previous European currency collaborations, when push came to shove, there wasn't sufficient power to actually punish the countries not holding up their end of the bargain.
Now traditionally, that was "fixed" by leaving the cooperation, hence it was thought that by actually agreeing on one currency, that would take that option away and make everybody keep in line. Unfortunately, it turned out to be the opposite. Instead we got all the old problems without the old solution available. Hence they're in worse shape than they were before...
That couldn't happen in a federation such as the US as the central bank has actual teeth. In the Eurozone, it doesn't. Hence the two economies are not comparable.
That's quite a load of bullocks. The Greek people, for instance, have always been one of the hardest working cultures on the continent. For you to simply claim it's because they are in trouble because they are lazy is really stunning.
Nice way of putting words in my mouth... But at least we now know that you consider yourself Greek, and hence the big mouth, and bad manners have been explained... ;-)
No, I didn't ascribe the Greek/Italian/Spanish/Portuguese economic situation to laziness. As a matter of fact, I pointedly, didn't ascribe it to any one, multitude of, or particular cause. I just observed that these economies have never done well in modern times, for more than a short period of time at a stretch. And that's even when pumping in billions to try and get them on the right track. (Hell, this is even true within Italy, and hence the Lega Nord party's rhetoric to get rid of the "south," meaning southern Italy).
Of course, it goes without saying that however hard the Greeks work (or not), has no bearing whatsoever on the Spanish economy... You might as well blame their lack of economic success on too much sun. At least they have that in common.