The political fight over superannuation has intensified as the government seizes on Bill Shorten’s multi-billion dollar gaffe.

The Labor leader has shifted his campaign to Western Australia and will target marginal Liberal seats.

While Mr Shorten’s focus will continue to be on health policy, he’ll come under pressure to clarify his position on superannuation after matching a Coalition promise not to increase taxes on super savings.

But this creates a $34 billion gap in Labor’s costings.

Super expert Michael Rice says Mr Shorten is not the first politician to make this mistake, arguing the Howard government also got into trouble over super taxes

They simply changed the name of their policy.

“We have for many year the superannuation surcharged,” he said.

Costings remain troublesome issue for Labor.

On Tuesday Mr Shorten dodged questions about the costings of his emission reduction target in an embarrassing exchange with a determined Channel 10 journalist at a press conference.

In a fiery exchange on the campaign trail in Boothby, @billshortenmp has avoided questioning on the cost Labor’s emission reduction target would have to the Australian economy.

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— Sky News Australia (@SkyNewsAust) April 16, 2019