Actually most economists that I've read from very different camps agree that the main problem in EU is monetary union without political union. Specifically, European nations used to solve that kind of crisis devaluating currencies, now an impossible measure. So taking Greece completely out of the Union was a sensible proposition... among others. It wasn't the decision that was finally taken, but it doesn't seem so weird at all.

If you take some time to think about it, the problems that you mention in other comments like high pensions demand extremely hard measures to be solved. People won't give up what they consider their well-deserved rights so even if you plan to remove red tapes and throttle the public money tap, it would take a long time with strikes and social unrest everywhere. That kind of problems are never solved with fair measures unfortunately. So whatever you think Varoufakis was wrong about, I'm very sure nobody had a right answer for it, including the current path.

Best of luck, anyway.