If I understand it right, Greece is an example of a country which gave up its own currency (and with it the power to play certain tricks to nudge the economy) without having the productivity to make it work without those tricks. So they ran into trouble, and asked the controllers of the currency for help, which was refused except on terms that minimized the helpfulness (austerity measures make sense for balancing a budget but do very little to increase the flow of currency in the economy - and "flow of currency" is pretty much what an economy is, so...) Since Germany's the one with all the productivity, and hence a lot of the power over the Euro, they get blamed by the Greeks for the lack of helpfulness. Whether it's really warranted takes more knowledge than I have.