"The European Union wants Greece to keep euro and to fulfill its commitments" - Europe 1
We can already ask legitimate questions about how growth is evaluated in the world (to get stuck in traffic is consuming fuel and produces growth), but even without going that far, even accepting measurement tools of economists, we can only deplore the way these measures are exploited then.
A drop in growth - real or only excepted - scares the markets, this fear is transmitted immediately to companies who need investors to survive and are forced to close or relocate. At that time, even companies that are not in danger use this pretext to get rid of not profitable enough staff or to review salaries downward. These practices have of course effects on the purchasing power of populations, and declining purchasing power amplifies the decline and the fall of markets.
Finally, we find ourselves a bit like asking a dowser to assess the situation. The pendulum is not tied to anything other than the person holding it with his fingertips.
Moreover, when we speak of restoring growth to the Athenians, most say, "Anyway, there is no more money here, it's terrible" and they sigh of despair.
Except that if it does not bother so much the average European to know that twenty percent of the Greek people are unemployed, it is now settled that state revenue that comes from taxes on all profits earned on its soil diminishes while transactions turn rare.
But those who invested in Greece now realize that high interest rates that allowed them to make large profits was related to the risk of not being reimbursed.
Staying in the euro area implies to have to accept the efforts required by neighborhood countries, or to find themselves unable to pay its civil servants in a few weeks. However, the non-payment of civil servants will lead eventually to the inability to maintain law and collect taxes.
Consenting more effort will allow to reach the subsidies of the troika (Europe, IMF and central bank), but will maintain zero growth. The country will survive somehow, and the debt will increase because the state can not touch money to pay it back. Or, it will boost the economy with an ultra-liberal system in which workers receive barely enough to survive and are deprived of all their social rights acquired previously (social security, vacation, retirement ...)
The Greeks feel (perhaps rightly) their country is used as a laboratory to establish such a system across Europe. The debt can not be refunded without growth, and growth is not to be stretch to infinity, all countries will end up either to the wall and will return to a social model as the one we knew in England, after the industrial revolution, which produced misery along with the progress.