A Coalition MP has threatened to cross the floor if the Federal Government does not make changes to its superannuation plans.

Queensland MP George Christensen has issued the warning following ongoing anger about a proposed $500,000 cap on non-concessional contributions.

He said if the changes were not made, he would express his anger on the floor of Parliament.

"Quite frankly, what's being proposed at the moment I just could not, in any good conscience, vote for," he said.

Sorry, this video has expired Explained: Proposed superannuation changes

He described the measures as a "Labor-style" policy and a "lazy government's way" of achieving budget savings.

"Obviously the numbers are tight, it depends on how the Labor party votes, the crossbenchers vote."

Mr Christensen, who was re-elected with a reduced margin in the Queensland seat of Dawson, said he believed the issue was causing anger within the Liberal Party base.

He warned the issue could have been the deciding factor in the neighbouring seat of Herbert, where a recount will soon get underway.

"Did [superannuation] cost us the election? Well, obviously no it didn't because we're still in government. Did it cost us some seats? Maybe, in seats like Herbert where it's coming down to the wire, perhaps it did make a difference."

Mr Christensen suggested further savings could be made from welfare to make up the difference and also flagged his opposition to the $1.6-million pension fund transfer balance cap.

Deputy Prime Minister Barnaby Joyce, who has crossed the floor 28 times, said Mr Christensen had the right to vote against the policy.

"We always give our people the right if they have a strong and well-founded view they can explain to the partyroom as to why they believe a certain way," he said.

Prime Minister Malcolm Turnbull has promised to listen "keenly" to concerns within the Coalition over the policy, with a ginger group of MPs and Senators lobbying to change the superannuation policy unveiled in the May budget.

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Super reform needed to maintain credit rating: Morrison

Treasurer Scott Morrison said the Government was in a position to address specific issues raised by the Coalition, but was adamant the overall package was needed to help retain Australia's triple-A credit rating.

"There are technical issues that can be addressed within the scope of the policy, and that process is well underway," he said.

"But that doesn't represent a change in policy, it represents a practical implementation of the policy."

Mr Morrison added the $500 million in savings would have to be found elsewhere if the policy was dumped or watered down.

"When things come off the table, other things have to go on, because our obligations to reduce the deficit, to return the budget to balance, to address the concerns by the agencies which can have an impact on our AAA credit rating," he said.

"I don't think we can be careless in under-assessing ... the statements that have been made by the ratings agencies, particularly after the election."

In a statement, Labor's spokesman for superannuation Jim Chalmers said the issue pointed to a "civil war" in the Coalition.

"Clearly, the Liberals have made a monumental mess of superannuation, and this continuing chaos puts the integrity of our system at risk," he said.

Mr Chalmers said Labor was committed to an independent review of the measures.