Morrison defends Mundine's pension pitch

Scott Morrison has defended one of his hand-picked candidates for promising to lift the aged pension, even though the Liberal Party has no such plans.

Warren Mundine has been driving a campaign bus throughout the NSW seat of Gilmore emblazoned with a pledge to increase the aged pension rate.

The prime minister claimed Mr Mundine was simply pointing out the payment automatically increased every six months.

"It is indexed, going up twice a year, just like all payments of that nature, whether they be pension or Newstart, they go up twice a year," Mr Morrison told reporters in Perth on Tuesday.

Opposition Leader Bill Shorten pointed out governments of all persuasions increased the pension in line with inflation.

"That's like giving yourself a medal for getting up in the morning," he told reporters.

Mr Mundine posted a photograph of his campaign bus to social media, but it has since been taken down.

His pension promise has since been overwritten by a pledge to build a stronger economy.