Imagine a vicious teacher who gives to his pupils impossible tasks, and then sadistically jeers when he sees their anxiety and panic. The true goal of lending money to the debtor is not to get the debt reimbursed with a profit, but the indefinite continuation of the debt that keeps the debtor in permanent dependency and subordination. For most of the debtors, for there are debtors and debtors. Not only Greece but also the US will not be able even theoretically to repay its debt, as it is now publicly recognised. So there are debtors who can blackmail their creditors because they cannot be allowed to fail (big banks), debtors who can control the conditions of their repayment (US government), and, finally, debtors who can be pushed around and humiliated (Greece).
—  Slavoj Zizek