Varoufuckits on Greece leaving the Eurozone:
[...]
Mark Taylor, University of Warwick—Would you agree that Greece does not fulfil the criteria for successful membership of a currency union with the rest of Europe? Wouldn't it be better if they left now rather than simply papering over the cracks and waiting for another Greek economic crisis to occur in a few years' time?
Varoufakis: The eurozone's design was such that even France and Italy could not thrive within it. Under the current institutional design only a currency union east of the Rhine and north of the Alps would be sustainable. Alas, it would constitute a union useless to Germany, as it would fail to protect it from constant revaluation in response to its trade surpluses.
Now, if by "criteria" you meant the Maastricht limits, it is of course clear that Greece did not fulfil them. But then again nor did Italy or Belgium. Conversely, Spain and Ireland did meet the criteria and, indeed, by 2007 the Madrid and Dublin governments were registering deficit, debt and inflation numbers that, according to the official criteria, were better than Germany's. And yet when the crisis hit, Spain and Ireland sunk into the mire. In short, the eurozone was badly designed for everyone. Not just for Greece.
So should we cut our losses and get out? To answer properly we need to grasp the difference between saying that Greece, and other countries, should not have entered the eurozone, and saying now that we should now exit. Put technically, we have a case of hysteresis: Once a nation has taken the path into the eurozone, that path disappeared after the euro's creation and any attempt to reverse along that, now non-existent, path could lead to a great fall off a tall cliff.
So despite being an economist and someone able to grasp complexities and using so many words to express himself here it is; he believes Greece would fall off a tall cliff if it left the Eurozone. We should invite him to OTNOT to drill this down.