Tax changes ruled out as treasurer launches food fight

The treasurer has poured cold water on any new taxes, saying Labor is focused on targeted cost of living relief.

Asked whether Labor would bring any new taxes to the upcoming federal election, Jim Chalmers said, "no, our focus is on the tax changes that we've already announced".

"The focus for us right now making the very generous superannuation tax concessions for people with high balances, still generous, but a little less generous," he said on Wednesday.

"We've made another number of other changes, but we've made it clear that when it comes to the budget, our priority is cost of living relief."

Dr Chalmers attacked an uncosted coalition policy to make business lunches tax deductible as he tried to position Labor as being the party for the working class.

"The only economic policy that (Opposition Leader) Peter Dutton and (shadow treasurer) Angus Taylor have is to make it to get taxpayers to fund long lunches for bosses," he said.

"Labor is for trainees and tradies and workers."

Mr Dutton said the costings would be released in due course but it was an effective spend of taxpayers' money to help boost staff retention in small businesses.

It would also flow on to more business for restaurants, cafes and pubs, he said.

"So there's a multiplier effect there in the economy and we think that's a really sound approach," he told reporters in Goulburn.

He also attacked the prime minister's handling of cost of living pressures.

"The bills just keep stacking up under Anthony Albanese," he said.

"The reckless spending by the prime minister obviously has to stop."

Dr Chalmers also started a food fight with the Greens after the minor party unveiled a plan to provide an $800 back to school payment to parents to help cover costs like uniforms, technology and supplies.

A family with two kids in a public school would be almost $2500 better off and would help families facing cost of living pressures, the Greens said.

The Greens would pump an additional $2.4 billion into public schools over four years as part of their plan, paid for by higher taxes on large corporations.

Dr Chalmers accused the minor party of being able to announce large spending policies without the need to manage the budget, saying Labor had already invested billions of dollars in schools.

The treasurer added that Labor had provided targeted cost of living relief including through tax cuts, energy bill rebates, reducing student debt and boosting wages.

He launched the attack outside a Sydney TAFE in the seat of Barton, alongside candidate Ashvini Ambihaipahar.

The inner-Sydney seat is held by Labor on a 15 per cent margin but former Indigenous Australians minister Linda Burney isn't recontesting the seat.

Mr Albanese was also in Sydney in the marginal seat of Parramatta alongside local MP Andrew Charlton to announce Commonwealth support for housing infrastructure.

The Western Sydney seat is held by Labor on a margin of less than five per cent.

It followed other infrastructure funding announcements by Mr Albanese in Western Sydney recently as Labor and the Liberals jostle for outer suburban seats.