Western Australia's premier says he would support a wide-ranging inquiry into corruption within the state's housing department if Labor wins re-election.
Ahead of Saturday's state poll, Mark McGowan also vowed to bring back former corruption watchdog John McKechnie, whose reappointment was blocked last year by a parliamentary committee.
The retired Supreme Court justice led the Corruption and Crime Commission for five years and helped to build the case against disgraced West Australian bureaucrat Paul Whyte.
Former housing department executive Whyte has pleaded guilty to more than 500 corruption charges relating to the theft of more than $22 million.
He remains in prison awaiting sentencing.
The premier has accused retiring Liberal MP Jim Chown of using his position on the committee to block Mr McKechnie's reappointment, which he has linked to the CCC's ongoing probe into the misuse of electoral allowances.
"Mr McKechnie was an outstanding corruption fighter," Mr McGowan said on Tuesday.
"His reappointment to the CCC was stopped by the Liberal Party. And that's basically because he investigated some of their upper house MPs and found gross corruption by Liberal Party members, so then they blocked his reappointment.
"If we are successful on Saturday, obviously we'd seek to reappoint him."
He added that he would back a comprehensive inquiry into the housing department if recommended by Mr McKechnie.
The CCC last year made findings of serious misconduct against former upper house Liberal MPs Brian Ellis and Nigel Hallett.
They were accused of colluding with disgraced former colleague Phil Edman and warning others about the CCC investigation, causing evidence to be lost or destroyed.
A 2019 report revealed Mr Edman had used his electorate allowance for acting as a "sugar daddy" to women he met online, visiting strip clubs and paying speeding fines.
After the CCC raided his premises, Mr Edman got a former MP and a party official to warn various sitting members that a seized laptop contained damaging material.
"It's got everything, all the emails between all of us, Black Hand Gang dinners, it's got the video, there's enough stuff on that f***ing computer to bury f***ing a lot of people," he said to the former MP.
The powerful upper house Procedures and Privileges Committee went on to reclaim Mr Edman's laptop from investigators on the basis of parliamentary privilege.
Opposition Leader Zak Kirkup last year said he would support Mr Edman's laptop being returned to the CCC, adding that the Liberal Party would "never protect corruption".
Mr McGowan said the make-up of the CCC committee would change in the next parliament and there was a "very strong prospect" it would reappoint Mr McKechnie.
"If the Liberal Party blocks him again well then obviously we'll bring in legislation to seek his reappointment," the premier said.
Almost 438,000 votes have so far been cast ahead of polling day, with Labor expected to comfortably win a second term.
