Bundesbank chief Jens Weidmann has warned that it is "wrong and dangerous" to rely on the European Central Bank as the only crisis manager.
"Central banks in recent years have been pulled into the role of a crisis manager. Some think that central banks are the only able ones. I consider this thinking wrong and dangerous," Mr Weidmann told Finnish newspaper Helsingin Sanomat in an interview
The Bundesbank president also repeated his warning that central bank financing could become addictive like a drug .
"The program can bring considerable risks to the monetary policy. Those risks now have to be limited and prevented," he was quoted as saying, Mr Weidmann said that the greatest risk was that cheaper financing took away the incentive for fiscal reform.
"Monetary policy can only buy more time. It is like a painkiller which will not erase the reasons but can cause risks and side effects," he said.
He also warned against Europe depending on the ECB to supervise banks in the banking union. "That would mask the conflict of interest between the supervision task and monetary policy. I hope that the ECB would only serve as a helper," he said.
Seperately, Christine Lagarde, the managing director of the International Monetary Fund, said no additional measures would be necessary for Greece if it carries out the reforms under its bailout programme.
"But if the structural reforms are not carried out [...] then more cuts would be necessary," she told Greek newspaper Kathimerini .
Entering a sixth year straight of recession, the heavily indebted country is relying on EU-IMF bailout packages.
It also received a private-sector debt cut early last year. Since 2010, the EU and IMF have committed €240bn (£201bn) in rescue loans to Greece, while last week the IMF unblocked a frozen tranche of €3.2bn from its pending aid package.
"Greece holds its future in its own hands... It is up to the country itself to succeed in its programme," said Ms Lagarde.