Main opposition SYRIZA-Progressive Alliance spokesperson Nassos Iliopoulos strongly criticised the government in an interview with Alpha TV on Tuesday.
Iliopoulos spoke of the "inadequate" measures to deal with soaring prices in a period when Greek households are struggling to make ends meet.
He explained that "the government does not want to take measures, it does not want to defend the public interest" and argued that "political pressure should be increased so that elections will be held".
"The answer to soaring prices cannot be patience," he pointed out.
"The reality is that Mitsotakis is not taking any risks with stability. Mitsotakis is the main factor for instability in the country", he said.
"Every day with the Mitsotakis government is a lost day for the country. He must leave immediately. We cannot get through the difficult winter that is coming with this government," Iliopoulos underlined.
Elsewhere, opposition PASOK-Movement for Change leader Nikos Androulakis said on Tuesday in an interview with Skai TV that "The dilemma of the next elections will be 'renewal and new ethos or more of the same'."
Androulakis accused both the current prime minister, Kyriakos Mitsotakis, and the leader of main opposition SYRIZA, Alexis Tsipras, of unreliability, urging voters to express their disapproval of both in the next elections.
In reply to a question about the possibility of post-election cooperation with the ruling New Democracy party, he answered: "I am fighting for a strong mandate so that a government that has social democracy at its core will emerge."
"I am asking for the vote of the citizens to overthrow a system of government that does not help the people in the long run," he added.
READ MORE: Greece calls on Europe to do more on energy security.