At the introduction of the Euro, many were quite concerned about Greece joining. The EU consists of independent, co-operating countries. This is quite differen

At the introduction of the Euro, many were quite concerned about Greece joining. The EU consists of independent, co-operating countries. This is quite different from the US. There is very little the EU can do without votes from the individual countries. So the assumption is that a country that joins the Euro has carefully evaluated the pros and cons. At the same time, the amount of subsidies a country receives is not dependant on that country being part of the Euro-zone or not. If you look at the Euro at the time of introduction, then there was every intent to make Euro as strong and stable as the Deutche Mark. Very much so against the wishes of France, who wanted a currency that was way more subject to political control. Of course, one incentive for countries to adopt the Euro was exactly was the article is about: a small currency stands no chance against investors speculating against it. Better hide in a big currency.