In Greece, as in several other European countries, reform of the pension system is not being well received.
Two of the largest private and public sector unions brought their members out to protest at the proposed changes which include the same retirement age of 65 for both men and women.
It is part of government efforts to meet the cost cutting terms of an EU-led bailout.
Ilias Iliopoulos, a civil servant union chief is angry about the massive loan.
“We will not accept foreigners imposing on us the conditions and terms for how people will live, how they will provide for their needs, or how this society will overcome its current problems.”
There are also proposed cuts to the state pension and related benefits and several private pension schemes are to be merged. Analysts say the system will go bust if its not reformed.
The government is to submit its pension reform bill to parliament next week.