The eurozone and the IMF are demanding this commitment, even asking for it in writing, for the second time since November, so that Greece will stay on the straight and narrow until early elections in the spring.
Meanwhile, German Economy Minister Philipp Roesler backed beefed-up EU monitoring of Greece in an interview, after Athens dismissed calls for it to give up control over its budget.
Roesler told the daily Bild the European Union should step in to ensure Greece toes the line of budget austerity.
"We need more leadership and monitoring in implementing the course of reform [in Greece]," he was quoted as saying.
"If the Greeks fail to do this themselves, the leadership and monitoring must come in a stronger way from outside, for example via the EU."
The idea that Greece might cede control over its budget to the EU was contained in a German submission to its eurozone partners revealed late on Friday by the Financial Times and confirmed by European sources.
Under the radical plan, a commissioner appointed by finance ministers from the other 16 eurozone states would be able to veto budget decisions made by Athens.
Greece is trying to wrap up a so-called Private Sector Involvement deal with private creditors for them to accept a halving of the €200 billion in debt they hold, with talks previously snagged on the amount of interest to be paid on the remainder.
Greek Finance Minister Evangelos Venizelos told reporters on Saturday he was hopeful of a deal within days.
An international troika made up of the European Commission, the European Central Bank and the International Monetary Fund is trying to make Greece's debt mountain sustainable by 2020. They demand the austerity measures and deregulation before they will agree to release the second bailout, initially agreed in October, for €130 billion.
Among proposed measures are revising wages to boost competitive-ness at a time when the economy is facing its worst recession in decades.
Papademos has warned labour cuts are among other measures that will determine Greece's economic survival.
The troika is also asking for new cuts in social benefits and higher property taxes.
Athens faces a critical bond reimbursement worth €14.5 billion on March 20.
- AAP