Well, it might have started 30 years ago, I believe you're right, but the right-wing government had two mandates, lasting altogether 10 years to change the course of it if they thought Papandreou had conceived the system that is going to collapse, but what they did is they actually took the benefits of that system without solving the obvious mistakes in it and continued on borrowing and spending money like a drunken millionaire, and when it was more or less impossible to save the country's economy they actually almost deliberately lost elections and left the social democrats with no power to solve it, with emptied treasury, cash seeking creditors and enraged masses of people on the streets.
Here in Croatia we have the similar problem now, ex right-wing prime minister is on court for corruption scandals, money laundering and financing political campaigns with dirty money, the country's economy is collapsing and when the elections happen next month the government will most likely change. The right-wing government is reluctant to step away, 'cause they borrowed so much money from foreign investors and sold all the main industries and banks to foreigners and there's no money left, and when the social democrats come to power they'll be facing empty treasury and angry people with no time to wait for better tomorrow...