"fiscal austerity plus hard money is a deeply toxic mix"
We have had the economic theories to properly understand all of this for something like 4 generations now. The fact that all this theory is being ignored tells you everything you need to know about the Austerians.
Its now clear, or should be clear, that the Greek program was doomed to failure without major debt relief;
no matter how hard the Greeks tried, austerity would shrink GDP faster than it reduced debt relative to the baseline, so that the debt situation was bound to worsen even as the attempt to balance the budget imposed vast suffering.
And there was no good, or even non-terrible, answer given Greeces membership in the euro.
But theres a broader lesson from Greece that is relevant to all of us and its not the usual one about mending our free-spending ways lest we become Greece, Greece I tell you. What we learn, instead, is that fiscal austerity plus hard money is a deeply toxic mix. The fiscal austerity depresses the economy, and pushes it toward deflation; if its accompanied by hard money (in Greeces case the euro, but a fixed exchange rate, a gold standard, or any kind of obsessive fear of inflation would do the trick), the result is not just a depression and deflation, but quite likely a failure even to reduce the debt ratio.
For comparison, look at everyones favorite example of successful austerity, Canada in the 1990s. Canada came in with gross debt of roughly 100 percent of GDP, roughly comparable to Greece on the eve of the financial crisis. It then proceeded to do a pretty big fiscal adjustment 6 percent of GDP according to the IMFs measure of the structural balance, which is about a third of what Greece has done but comparable to other European debtors. But unemployment fell steadily.
What was Canadas secret?
The answer was, easy money and a large currency depreciation. These offset the drag from austerity, allowing growth to continue.
http://krugman.blogs.nytimes.com/2015/07/08/policy-lessons-from-the-eurodebacle/