The Greek economy is dysfunctional to its core (even a passing skim-through of Michael Lewis's new book will give you a sense for just how dysfunctional it is). But that isn't the root of the problem. The root of the problem is that Greece was brought into the Euro monetary collective in the first place, and given the credit ratings and borrowing rates of a country like Germany. Banks had a large part in helping put lipstick on the Greek pig, covering up its systemic flaws and getting it ready for EU primetime.
So imagine that Greek dysfunction was like a caged and abused pitbull, and Greece's EU inclusion was like walking into that cage waving a bloody hunk of meat in either arm. Who do you blame when you lose a few limbs: the pitbull, or yourself?