It is very difficult to politicians to continue to publicly support austerity measures, and for obvious reasons. Europeans, generally speaking, have enjoyed a high degree of prosperity for a very long time now, including often very generous government welfare programs. Current generations find the removal of these services as an adhorrant non-option. But the fiscal and economic realities of the situation dictate that these cuts must be made, at least for the foreseeable future.
While the austerity measures in Greece have produced unpleasant and damage to the society, this damage is simply paying the consequences of spending more than one brings in at the government level. Deficit spending and balooning national debt may allow a boom cycle, but the measures taken are the inevitable price to pay for such actions and returning to deficit spending will only result in far more pain in the future.
Although Greece's new prime minister, Tsipras, may be correct that Greece should reduce its reliance on international loans and harsh penalties, the austerity measures are still necessary for the Greek economy to recover. On the world stage, we have seen over and over again the promises of communist economic principles failing a nation. Tsipras would like to see austerity measures end for caitalism to replace that economic system with communism. That makes little sense. In fact, in most historical instances, communism brought a different type of austerity for citizens of communist regimes.
Greece was responsible for causing a lot of the problems in Europe. What started in Greece led to Western Europe and eventually to the United States. Because Greece was a large part of the problem, they need to be prepared to do their fair share and continue austerity measures, for the good of the entire world.