Prime Minister Alexis Tsipras aims to send Greeks to the polls to vote on whether the electoral system should be changed.
With his approval ratings plummeting, critics argue the vote is a cynical attempt to secure a victory over the rival New Democracy party.
The referendum would also include questions regarding energy spending, water resources and the organisation of the Greek presidential election.
One rival politician has already hit out at Mr Tsipras’ proposed referendum, which could take place this autumn.
MEP Kostas Chrysogonos said he opposed the vote, which he saw as “an attempt to dissolve the Constitution”.
New Democracy may even boycott the referendum if it takes place and encourage citizens not to vote – a bold move which would add another layer of chaos to a country still recovering from tough European Union bailout measures.
Last week Germany’s finance minister demanded Greece push through drastic reforms in the country’s public services in order to achieve their bailout payments.
The Greek PM has been accused of trying to ‘dissolve the constitution’
Greece has been battered by austerity measures
This will bring the total eurozone disbursements for Greece to a staggering €181billion since 2010.