Ken Wyatt, the first Indigenous Australian elected to the House of Representatives, said a decision not to support the voice could come back to bite the Liberal Party.

“Parties that are out of touch will pay the consequence in the future,” he told ABC Radio National on Wednesday.

Mr Wyatt said debate in the lead-up to the marriage equality plebiscite in 2017 showed social media should not be underestimated by politicians.

“Parties can no longer ignore the will of people because social media has a profound impact in informing people on (the) fairness they want within Australian society,” he said.

Liberal MPs are preparing to land a formal position on the voice after months spent trading barbs with the prime minister over the proposal.

Opposition Leader Peter Dutton summoned party members to a meeting in Canberra on Wednesday.

His deputy Sussan Ley said a bipartisan voice process had gone “off the rails” because the prime minister had been unwilling to answer the opposition’s questions.

“There isn’t a moral high ground, there is no one (person) who is better able to articulate that by way of simply pushing something through and demanding that Australians vote for it,” she told Sky News ahead of the meeting.

“Unfortunately, in my view, the process has run well and truly off the rails.”

But Mr Wyatt, a member of the government’s referendum working group providing advice on the voice, said Ms Ley was incorrect.

“This is not all new work, it’s been a culmination from (former) prime minister John Howard, Julia Gillard and subsequent prime ministers,” he said.

“We’ve had this continuity and there have been numerous reports.

“People who argue contrary to that shows they did not give scant attention to even the executive summary of those reports.”

Some elected Liberals have called for a conscience vote on the matter, with NSW senator Andrew Bragg and Victoria’s Jason Wood saying that was in line with party tradition.

Referendum working group member Thomas Mayo urged the Liberals to support a constitutionally enshrined Indigenous voice, something which was long overdue.

“There’s nothing to lose for Australia and everything to gain,” he told Sky News.

“I say to the Liberal Party: reach into your hearts, think about what this (referendum) is for Australia, which is truly unifying.”

Meanwhile, a Newspoll conducted for The Australian and reported on Tuesday night showed 54 per cent of all voters support constitutional recognition and and the voice to parliament, with 38 per cent opposed.

The poll signals the likelihood that a referendum would meet the critical double majority test to succeed if one were held today, and that the referendum would also meet the requirement of obtaining a majority of voters in a majority of states, with Queensland the only state to fall short.

Liberal senator Hollie Hughes said the only poll which counted was the one on the day of the referendum, due to be held between October and December.

But Mr Mayo said the early polling indicated the sentiment of the Australian people was with the referendum working group and the ‘yes’ campaign.

“(Australians) have walked with us for a long time now … to see these results tells us that we can succeed when the referendum is held,” he said.