Anti-austerity protests have clogged Athens as the government struggles to finalise additional cutbacks with its creditors and seeks to jump start a privatisation drive delayed for months.
Some 2000 teachers, hospital doctors and municipal staff demonstrated against a new round of state salary cuts and job losses expected by October, with hundreds of security staff also demonstrating later in the day.
Most town halls were to remain closed until Thursday, with mayors warning that they already have trouble paying their staff because of prior funding cuts to local governments.
"State funding is down by over 65 per cent since 2009," Christos Kortzidis, mayor of the coastal suburb of Hellenikon, told AFP. "We are on the verge of a payment default."
Hundreds of security staff, some in uniform, took part in another protest later in the afternoon. It was their second protest since the debt crisis began, in 2010.
"We can't take it anymore. Right now I earn 19,000 ($A23,500) per year after more than 20 years in the service, and with the expected new cuts, my income will drop to 17,000 euros," said 43-year-old captain Mihalis Daskalakis.
"Before the crisis, in 2009, I was making 24,000 (euros)," the father of two added.
Prime Minister Antonis Samaras has called his coalition partners to a meeting, with time running out for Athens to finalise about 11.5 billion euros in cuts in 2013-14 to unblock access to EU-IMF loans.
News reports on Wednesday said the government was under intense pressure from its 'troika' of creditors - the EU, IMF and the European Central Bank - to cut pensions and severance pay and revise working hours.
Samaras has struggled to convince creditors that his government is determined to push forward with reforms that are months behind schedule, but the demands for further action have strained the conservative leader's three-party coalition.
Athens must wrap the cuts package up by Friday if it is to present the plan to eurozone partners then meeting in Cyprus.
On Tuesday, the state privatisation fund announced that several projects had moved a step forward for the first time since May.
The Hellenic asset development fund said it had shortlisted property developers from Israel, Greece, Britain and Qatar for the sale of up to 70 per cent of shares in the capital's former airport of Hellenikon, one of Greece's foremost real estate assets.
Another six investors, including companies from Britain and Russia, had been vetted for the development of land on the tourist islands of Rhodes and Corfu.
The government recently replaced the head of the privatisation fund after the agency concluded just four sales worth 1.8 billion euros over 11 months, compared to an overall five-year target of 28 projects worth 19 billion euros.
The troika report, expected in October, will determine whether Greece will be able to receive a much-needed 31-billion-euro instalment from its 130-billion-euro EU-IMF rescue package.
The upcoming measures are reported to include slashing pensions by 3.5 billion euros, health cuts worth 1.47 billion euros as well as a 517-million-euro reduction in defence spending.
But the creditors are believed to have rejected part of the proposals as unrealistic, sending Greek officials back to the drawing board.
Keep reading - next article