If revelations of phone tapping that even extended to cabinet ministers had been made in Belgium, justice would have taken action and at least one minister would have had the decency to resign, main opposition SYRIZA-Progressive Alliance leader Alexis Tsipras said in an interview on Open TV on Monday, while accusing the prime minister of being complicit in the affair.

"If the illegal monitoring case had erupted in Belgium, justice would have itself - instead of passing the buck to journalists - applied to the providers to find the evidence and, if it had been revealed that half the cabinet was under surveillance, one of the ministers would have had the decency to resign and the prime minister himself would be unable to stand," Tsipras said.

According to the main opposition leader, since the affair came to light in August, Prime Minister Kyriakos Mitsotakis had been "covering up, citing confidentiality and hiding, lying for four months".

"The government's latest narrative is that the prime minister is not complicit but is inept," the main opposition leader said, adding: "I tell you ... he is not at all stupid, he has the ability to understand exactly what is going on, he is in control of his aides and knows what they are doing. He is complicit and that is why he has been hiding all these months."

After everying that has happened, if the prime minister failed to resign than an additional crime will have been committed, because the greatest crime would be to get used to the idea that such things can happen, Tsipras said.