Consider the following scenario. After a victory by the left-wing Syriza party, Greece’s new government announces that it wants to renegotiate the terms of its agreement with the International Monetary Fund and the European Union. German Chancellor Angela Merkel sticks to her guns and says that Greece must abide by the existing conditions.
Fearing that a financial collapse is imminent, Greek depositors rush for the exit. This time, the European Central Bank refuses to come to the rescue and Greek banks are starved of cash. The Greek government institutes capital controls and is ultimately forced to issue drachmas in order to supply domestic liquidity.