Scott Morrison is still consulting with his coalition colleagues over planned changes to superannuation but insists there is a commitment to get the budget back in order, which the package will help deliver.
"We will continue to work through some of the contentious items that have been part of this discussion but what we won't walk away from is our commitment to arresting the debt and delivering the budget repair job," the treasurer told Sky News on Tuesday.
Mr Morrison released new analysis aimed at reassuring his restless backbenchers about the impact of his changes to super tax concessions.
The new details show the average super balance for the top 10 per cent richest Australians over 65 is $1.36 million, below the $1.6 million tax-free cap he's proposing.
Less than one per cent have made after-tax contributions above the proposed $500,000 lifetime cap.
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Mr Morrison will release draft legislation on Wednesday for part of the reform package aimed at making it easier for women, tradies and older Australians to catch up on super contributions, but not controversial issues like the $500,000 cap..
Labor's financial services spokeswoman Katy Gallagher described the analysis as "policy by powerpoint".
"In the four months since Scott Morrison first floated his plans to tackle unfair superannuation tax breaks, the treasurer still hasn't convinced his coalition colleagues to back them, much less worked out how to legislate them in the parliament," the senator said in a statement.
Liberal backbencher Michael Sukkar expects the broad structure of the super changes announced on budget night will be legislated.
"I wouldn't expect any wholesale changes," Mr Sukkar told Sky News.
"We took a suite of policies to the election ... there is nothing wrong with making sensible tweaks to those post-consultation with either colleagues or relevant stakeholders in the industry."
Friendly Societies of Australia president Matt Walsh.urged all MPs to support the reform measures, saying they better target tax concessions to ensure that the super system is "sustainable, affordable and equitable".
"They should be implemented without amendment. Any modifications will compromise the benefits of the reform package," Mr Walsh said in a statement.
