Labor is vowing to stop any effort to overturn the legislated increase in the superannuation guarantee, signalling a political brawl with the Morrison government over any contentious findings from its retirement income review.

Shadow treasurer Jim Chalmers will use an address to the ACTU's superannuation trustees forum in Melbourne on Thursday to defend the already-legislated increases in the super guarantee and reject claims workers' wages have been hurt by previous lifts.

Shadow treasurer Jim Chalmers will on Thursday use a speech to vow to stick to the legislated increases in the superannuation guarantee levy. Credit:Alex Ellinghausen

A review, headed by respected former Treasury official Mike Callaghan, will spend the next eight months reviewing key elements of the retirement income system including aspects of the age pension, voluntary savings and compulsory superannuation.

It is due to report before the next increase in the super guarantee levy, legislated to lift to 10 per cent on July 1, 2021, before gradually going to 12 per cent. To prevent the increases the law around the super guarantee would have to be overturned.