FRANKFURT — Is it time for the European Central Bank to be as generous to countries as it is to banks?

Since the beginning of the financial crisis, the central bank has been lending euro area banks as much money as they want, trying to maintain the liquidity — or continual flow of money — that is the lifeblood of the global financial system.

But because the central bank has refused to offer the same easy lending service to countries like Italy and Spain, it is not confronting the euro area’s most fundamental problem — a sell-off of debt from the troubled countries that is pushing their borrowing costs to dangerous levels.

Investors pushed up interest rates on Italy’s debt to record-high levels last week during the political crisis there. And even Monday, after the supposedly calming effect of a new, technocratic prime minister in Rome, lenders were demanding that Italy pay interest rates at levels high enough to eventually bankrupt the country.