A $130 billion plan to keep money flowing into Australian workers’ pockets during the coronavirus pandemic has been described as a lifeline to workers and families across the Mallee.

Businesses will be given wage subsidies of $1500 a fortnight for each worker to keep staff on during the coronavirus crisis as part of an unprecedented $130 billion package.

Prime Minister Scott Morrison said the package could help six million Australians as he unveiled the federal government's third and biggest round of economic stimulus on Monday.

"We want to keep the engine of our economy running through this crisis," he said.

The federal government will give the $1500 allowance to businesses and not-for-profit organisations that have taken a 30 per cent hit to turnover because of the coronavirus.

Companies turning over more than $1 billion will be eligible if they have taken a 50 per cent hit.

The subsidies will last for six months, with full-time, part-time and casual workers who have been with their employer for at least 12 months eligible.

Sole traders have also been included in the package.

Payments will flow to businesses in the first week of May, with the program to start from March 30.

Federal Member for Mallee Anne Webster described the announcement as an “incredible and historic step”.

“I have been contacted over recent weeks by numerous people concerned about how they were going to get through this period,” Dr Webster told Sunraysia Daily. “By employers worried about looking after staff and employees not sure what they would do without a job.

“These payments will provide a way for businesses in Mallee that have had a significant decrease in revenue due to the coronavirus to be able to keep staff employed, and allow their business to come out the other side.”

State Member for Mildura Ali Cupper also welcomed the package.

“This job payment will be a lifeline to countless workers and their families across our electorate,” Ms Cupper said on Monday night. “I’m particularly pleased to see it includes casual workers, though I’m concerned about the 12 month requirement. I think this will exclude too many local families.

“I’m hoping our Federal Member Anne Webster will go into bat for those casual workers and their families who will miss out under the current proposal.”

Under the new package, workers stood down since March 1 will be able to qualify for backdated payments.

New Zealanders on temporary working 444 visas and migrants eligible for welfare are also included.

Mr Morrison said some countries would face economic collapse or hollowing out in coming months as the disease spreads globally.

"In the very worst of circumstances, we could see countries themselves fall into chaos - this will not be Australia," he said.

Parliament could sit as early as next week to pass legislation related to the "job-keeper" payment, with Labor likely to support the overall package.

Coupled with support for banks, the government has so far set aside $320 billion, or 16.4 per cent of GDP, to deal with the fallout from the virus.

ACTU secretary Sally McManus said unions were glad the government had listened to the campaign for a wage subsidy program, but were concerned the $1500 was not enough.

"We believe that allowing this amount to increase up to the median wage of $1375 a week is what is needed," she said.

"We also want to ensure all casuals who could have reasonably expected to work now but have lost their jobs because of the pandemic are covered."

There was a case for workers who had been let go to be re-employed, she said.

As well, there could be cash flow issues for many workers whose employer may not survive another six weeks without immediate support.

Treasurer Josh Frydenberg said Australia was facing an economic and health war.

"The past weeks have been tough but the weeks ahead will be tougher," he said.

"Australians know that no matter how great the challenge is, our government has their back."

Business Council chief executive Jennifer Westacott said the subsidies were a fair way of making sure employees stayed connected to employers during the crisis.

"This huge package will keep people in jobs and vitally, make sure Australia is ready to rebuild quickly once this challenge passes," she said.

Greens leader Adam Bandt believes Australia should guarantee 80 per cent of all workers' pay.

"This wage subsidy is too little, too late," he said.