Solely created by PASOK's Andreas Papandreou. Creating a huge system of welfare state without the economy to pay for it is pretty HP.
If you honestly think that Karamanlis had nothing to do with the creation of the clientelist state then could I interest you in buying the Parthenon for a very reasonable rate?
Most of the increases in debt came with Andreas Papandroeu going into power and enacting new spending that was paid with by rising government debt from borrowing from foreign countries.
Also, you know, the banking crisis...