Mr Barnett says it is a welcome boost.
"There's a significant migrant population, particularly Italian population, who were very strong supporters of the late John D'Orazio and I think they will take notice of that," he said.
"It's great to see people coming out in the community supporting Ian Britza."
Mr D'Orazio was Police Minister in the former Labor government but was demoted in 2006 after revelations he had driven without a license after not paying speeding fines.
He was later forced to resign from the party after surveillance footage captured him meeting a man at the centre of a corruption probe.
Mr D'Orazio was eventually cleared of wrongdoing in both matters.
He then contested the seat as an Independent, directing his preferences to Mr Britza who won by just 40 votes over Labor's Reece Whitby.
At the time Mr Whitby, a former television reporter, described Mr D'Orazio's decision to preference the Liberal candidate over him, as a "vindictive act of revenge."
Morley is a key seat at this election with the last redistribution giving Labor a notional margin of 0.8 per cent.
The Opposition Leader Mark McGowan once described Mr D'Orazio as the "worst ethnic branch stacker" in the history of the WA Labor Party.
But, he was reluctant to buy into the issue today.
"It's a free country, if people want to put advertisements in the paper that's up to them," he said.
"I'm not going to be critical of the family or anyone else involved.
"I have no idea about the motivations involved in this, I haven't spoken to them."
Mr Whitby is running for the seat again and Mr McGowan says he stands a good chance this time around.
"Reece Whitby is an outstanding candidate," he said.
"He lives in the electorate, he's been a part of the community working there for 30 years.
"I think the people of Morley see the value in Reece and I'm very hopeful he'll be elected."
Labor has based its claim on the electoral roll.