The ECB argued that taxpayers should pick up the entire tab for Greece’s bad sovereign debt, for fear that any private-sector involvement (PSI) would trigger a “credit event,” which would force large payouts on credit-default swaps (CDSs), possibly fueling further financial turmoil. But, if that is a real fear for the ECB – if it is not merely acting on behalf of private lenders – surely it should have demanded that the banks have more capital.