Given the situation, I don't think that Greece has anything to gain from staying in the common currency.
After ~ 8 years of Troika mismanagement the country is in dire situation and there has not been the slightest perception of improvement. So even if SYRIZA choose to blink, the next government wont.
s/Greece/people running Greece at that time/ If you asked the who didn't profit from joining the Euro, likely you might have gotten a negative reply.
Seriously it's not a fault issue here because multiple parties (including the vampire squids that are multination financial corporations like Goldman) conspired to profit from it.
Question is what is going to be done to right the ship and avoid calamity?