Former prime minister Paul Keating wants voters to drive a stake through the "dark political heart" of Home Affairs Minister Peter Dutton.
The 1990s Labor leader said he had never seen a public figure as mean as Mr Dutton.
"Those electors in Dickson [in Queensland] have a chance to drive the political stake through his dark political heart ... and I hope they do," he told ABC Radio on Tuesday.
Mr Keating attacked the Liberal party as he backed Bill Shorten for victory at the polls on Saturday.
"What's amazing about the Liberal party (is) they've actually made a virtue of having no strategy," he said.
He also blamed Liberal leadership changes for voter disillusionment.
"This is what happens when governments fail to have a program, fail to have imagination, fail to have vista, a panorama of where the country is going," he said.
"And particularly when you see these internecine battles like the ones between Turnbull and Abbott and then Morrison replacing Turnbull. People get switched off by the internecine battles, the ideological confusion, the lack of clarity of policy and of course they drift to the minor parties."
Scott Morrison was just "the guy next door" who would jump the fence and do a barbecue and pull on a baseball cap, Mr Keating noted.
"We need more than the guy next door," he said.
