Labor is seeking to seize momentum heading into the fourth week of the election campaign with its official launch in Perth.

The launch comes as Prime Minister Scott Morrison returns to the issue of online safety and defends the government's record on addressing cost of living pressures.

Anthony Albanese's broad theme will be building a better future and a stronger economy under Labor, pitching a new housing affordability policy.

Housing is likely to be a hot topic this week with the Reserve Bank widely expected to lift the cash rate on Tuesday, for the first time in 12 years.

Mr Albanese said ahead of the launch it had been a tough few years for Australia and people wanted more than a return to the past.

"We can do better than just having three more years of the same ... Labor has a plan for a better future," he said.

"We need to shape the future rather than be passive and shaped by it."

Shadow treasurer Jim Chalmers said Labor had "tangible policies" to take pressure off the cost of living for Australian families, in the wake of last week's 5.1 per cent inflation rate.

"Whether it's in childcare, whether it's in healthcare, whether it's power bills, whether it's mortgages, mortgage repayments," he said.

Labor will use the launch to unveil a new housing policy, where an Albanese government would give homebuyers up to 40 per cent equity to buy a home.

Campaigning in the Sydney seat of Parramatta, Mr Morrison said Labor's plan was seriously flawed.

"They (the Labor government) will have equity in your home and as that your equity goes up, they're gonna keep it," he said.

Mr Morrison announced the coalition's blueprint to improve online safety, an issue he also intends to take up - if re-elected - at a global level at the G20 summit in Bali later in the year.

Big tech will be required to build enhanced safety controls into their devices that are easy for parents to use and hard for children to bypass.

The eSafety Commissioner would work with Apple, Samsung and others to design device settings and a binding code under the Online Safety Act.

If the industry does not create these controls within 12 months of the government being returned, it would move to force companies to comply with regulations.

On broader economic issues, asked what the coalition would do about rising grocery prices, Mr Morrison said he had already halved the petrol tax, provided cash payments to pensioners and implemented an income tax break to start on July 1.

He said the war on Europe and the ongoing impact on supply chains of the COVID-19 pandemic were key pressures on inflation.

"The Labor Party think they have some kind of Harry Potter wand that you can just raise in government and it changes the price of a lettuce - it's ridiculous," Mr Morrison said.

"That shows a complete lack of understanding of what is driving prices."

© AAP 2022