WTF are you talking about? They've been on board the austerity gravy train since 2010, it hasn't helped growth one bit - in fact the opposite, you cannot cut your way out of a depression. Hence why the Greek economy contracted by 25% 2010-2014Either way, austerity is coming. The question is do you want to go through it on the euro or go it alone. Given Greece is a shit hole I'd wager they lose less by staying with the euro.
Each round of bailout funds has been provided with the conditions that Greece cut more. After five years the Greek people clearly feel there is nothing left to cut, hence why they voted in an anti-Austerity party. But the Greek people also want to stay in the Euro, hence putting it to a referendum.