Australian treasurer Jim Chalmers is set to deliver the 2024 Budget tonight, and economists are raising their eyebrows at some promises.

The reworked stage 3 tax cuts and energy bill relief are expected to be included in a set of nationwide cost-of-living support measures, but Chalmers is insistent they won't fuel inflation.

HSBC chief economist Paul Bloxham is sceptical these measures won't add to Australia's inflation woes. 

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