Clive Palmer has added an inquiry into Queensland corruption to his political agenda ahead of his Palmer United Party senators taking their seats.

A motion calling for a Senate inquiry into corruption in Queensland will be one of the first actions of the Palmer United Party after July 1.

Billionaire businessman and MP Clive Palmer will hold a 5.30pm media conference in Canberra on Wednesday to spell out his party’s agenda once the Senate changes over.

The PUP senators – Glenn Lazarus (Queensland), Jacqui Lambie (Tasmania) and Dio Wang (WA) – who have an arrangement with the Australian Motoring Enthusiast Party’s Ricky Muir (Victoria) will hold key votes in the new Senate.

The government will need the support of six out of eight crossbenchers to get legislation passed.

Mr Palmer told 2GB Radio on Wednesday that he would spell out how the PUP will vote on the carbon and mining tax repeal bills as well as budget legislation, ahead of a meeting with Prime Minister Tony Abbott on Thursday.

“We are all worried about fairness,” Mr Palmer said. “Australians regard fairness as being very important.”

Mr Palmer said one of the party’s first actions would be for senator-elect Lazarus to move a motion setting up an inquiry into alleged corruption in Queensland Premier Campbell Newman’s government.

“This is about cronyism,” Mr Palmer said.

“What you’ve got is a whole different culture where the Liberal National Party are cronies.”

The inquiry could cover such issues as the appointment of the state’s new chief justice and favouritism of LNP-linked companies in the awarding of government contracts.

Other issues to be pursued by PUP would be cutting back the national broadband network to an $8 billion project covering only rural and regional areas, a national gas reservation policy and encouraging superannuation funds to invest in infrastructure.