Queensland Liberal MP Warren Entsch has given former prime minister Tony Abbott an ultimatum: stop the public criticism, or quit Parliament.
The veteran MP's advice came just a day after Mr Abbott offered up his latest critique of the Turnbull government's performance, including a five point plan to regain the trust of voters.
"He was going to step down graciously, he was going to serve in the best interests of the country but he was not going to do a running commentary, he was not going to be critical," Mr Entsch told the ABC.
He added that Mr Abbott's actions were putting him at risk of being seen as a "spoiler" whose only goal was to seek revenge for Malcolm Turnbull ascension, after he ousted him from the prime ministership in 2015.
"I find it very disappointing, it seems to me that it is more about payback for our current Prime Minister," Mr Entsch said.
Mr Entsch used a Fairfax Media interview to warn Tony Abbott that his own history as prime minister was at risk if he kept up the public commentary.
"He'll just be seen as a wrecker, hellbent on destroying an individual."
"If it continues like this, this will be his legacy - and he won't be remembered fondly. He'll just be seen as a wrecker, hellbent on destroying an individual," he said.
Opposition Leader Bill Shorten said Prime Minister Turnbull needed to do more to "get his own house in order".
"You cannot run a proper government and fight for Australian jobs if you can't keep the division under control," Mr Shorten said.
Mr Abbott said he came up with the plan for better government after speaking to voters during his charity bike ride from Albury to Sydney, which he called his "listening tour" of middle Australia.
He floated some advice for Malcolm Turnbull in an opinion piece, and expanded on it in his new regular radio spot with Ray Hadley on 2GB radio.
"If we don't do something about Bill Shorten there could very well be a change of government at the next election," he said.
"We need the best possible government and that's why I've been putting forward, if you like, a five point plan for better government."
Mr Abbott's plan includes reforming the Senate, ending subsidies for renewable energy, which he said would bring down power prices, de-funding the Human Rights Commission, addressing house prices by halting immigration, and being proud of Australia.
Mr Abbott said "as a former PM" he had every right to speak out, and would continue to do so during his appearances on Sydney's highest-rating talk show every fortnight.
Cabinet Minister Scott Ryan said every member of the Liberal Party was free to make contributions.
"It's up to every individual member to make the judgement about how that helps the parliamentary team and how that helps the government," he told Sky News.