West Australian Labor leader Mark McGowan entered a party campaign rally to the strains of a sci-fi theme song but made his case for Saturday's election on down-to-earth concerns for voters.

In six weeks of campaigning the Labor leader said he had focused on tackling health, education, community safety and public transport through his Metronet plan.

"Mr Barnett mocked Metronet by saying Perth is not London," Mr McGowan said, referring to Liberal Premier Colin Barnett.

"Well, Mr Barnett, I make this observation - Perth may not be London, but the way things are going under your stewardship we will end up with traffic like Los Angeles or Bangkok."

The Liberals had also failed by allowing increases in power, water and gas bills, he said, describing Mr Barnett's arrogance as "breathtaking".

About 150 people crammed into the historic Victoria Hall in Fremantle for Monday's rally, including prominent WA Labor figures Ben Wyatt, Roger Cook, Sue Ellery, Michelle Roberts, Rita Saffioti, Paul Papalia and Margaret Quirk.

Fremantle MP Melissa Parke was the only federal Labor identity to make an appearance, but she did not speak.

Mr McGowan also went on the attack over privatisation, saying Labor would not "sell off the family silver" but the Liberals would sell off Western Power, Water Corp and possibly some hospitals.

He said controversial Treasurer Troy Buswell was being groomed to take over as premier if the Liberal Party won the election, prompting boos and hisses from the crowd.

"Troy Buswell is the master of deceit and deception," he said.

Labor would continue to support mining and foster other industries like tourism and science, Mr McGowan said.

He was given a standing ovation after his speech, before he boarded a bus bound for regional WA for more campaigning.

But while he arrived onstage at the rally to the theme of Stargate SG-1, polls indicate he might need a miracle in the style of MacGyver - Richard Dean Anderson's other TV show - to win on Saturday.