Leaders from Cape York, inner Sydney, Goulburn-Murray, and the Kimberley will seek to meet with members from all sides of politics next week to share their experiences from their local communities.

Chair of the Empowered Communities leaders group Ian Trust said the debate needed to be informed by local voices as the Liberals hold out on lending support.

"A voice will give Indigenous people a say in the matters that affect us, so we can work in partnership with governments and more effectively bring about the practical changes needed to close the gap," the East Kimberley leader said.

Cape York leader Fiona Jose said the voice could shift the dial on First Nations' disadvantage in areas such as education, health care, employment and cultural protections.

"Our local and regional communities must be empowered to partner with government to action strong solutions," she said.

"It's a practical and enduring way for Australia to recognise its first peoples."

Meanwhile, the federal opposition leader is accusing the government of deliberately withholding detail on its push to enshrine an Indigenous voice in the constitution for political reasons.

Peter Dutton and shadow attorney-general Julian Leeser were briefed by the referendum working group on Thursday after calling for more information on the proposed voice's make-up and function.

Mr Dutton accused the prime minister of withholding details of the voice as a deliberate political strategy.

"Like all Australians, we want to see a better outcome for the Indigenous people of our country," he told Nine's Today program on Friday.

"We are willing to look at any measure to do that. There are lots of questions around the voice and lots of detail that hasn't yet been provided.

"The pressure continues for him to put it out so people can make an informed decision. Some models will work, others can't."

The Albanese government has consistently said the referendum will only deal with two issues, the recognition of Indigenous people in the constitution and their right to be consulted on issues pertaining to them.

Prime Minister Anthony Albanese wrote to the opposition leader, saying the final model for the voice would then be decided by parliament if Australia agrees to the principle of enshrining the body in the constitution.

"We know the most effective outcomes for the Aboriginal and Torres Strait Islander communities occur when their voices are heard and they have ownership over the policies that affect them," Mr Albanese wrote.

He reiterated that the voice would have no veto function over legislation.

Australian Associated Press