"It is very clear from its origin that lender of last resort by a central bank is intended to be lending to individual banking institutions and to institutions that are clearly regarded as solvent. And it is done against good collateral, and at a penalty rate. That's what lender of last resort means.
"That is a million miles away from the ECB buying sovereign debt of national countries, which is used and seen as a mechanism for financing the current-account deficit of those countries . . .."
-- Mervyn King, Bank of England, quoted here