A re-elected coalition government would not make any changes to superannuation or workplace laws beyond that already announced, says Malcolm Turnbull.

The prime minister used his final major speech before Saturday's election, which the coalition is expected to narrowly win, to head off a number of Labor's main attack points.

He admitted not all of the superannuation changes announced in the May budget were popular, but they made the system fairer.

"We will not be making any further changes to superannuation in the next term of government," he told the National Press Club in Canberra.

Asked to guarantee no post-election surprises in terms of industrial relations law, which was the trigger for the double dissolution election, he said: "Absolutely."

Mr Turnbull said he would not be going beyond reinstating the building watchdog, tougher penalties for union and employer group misconduct and changes to the Fair Work Act to protect volunteers in the wake of Victoria's controversial CFA agreement.

"Day one" priorities, he said, included legislating tax cuts for middle income earners and businesses with under $10 million turnover, the CFA law changes and receiving a briefing on how Australia can best deal with Britain's exit from the European Union.

Mr Turnbull again took aim at Labor's claim the coalition planned to privatise Medicare.

"Australians are well and truly over this tactic of setting out deliberately and dishonestly to fuel fear and division," Mr Turnbull said.

Labor has made much during the eight-week campaign of Mr Turnbull's corporate connections and putting economic matters ahead of health and education.

The prime minister said a strong economy provided the revenue for public services.

"The economy does not rule our lives, but the assurance of a strong economy helps underpin that fundamental confidence in our future," he said.

Labor leader Bill Shorten, who campaigned in Brisbane on Thursday, said Mr Turnbull's problem was he could not unite Australia with his policies.

"You cannot unite Australia whilst you are cutting school funding ... when your only economic plan is to give tax cuts for millionaires and corporate tax giveaways for the big end of town," Mr Shorten told reporters.

Summing up his campaign, which he said began with him winning the Labor leadership ballot in 2013, Mr Shorten said Labor had "probably exceeded the expectations of the people who wrote us off".

"But we are still going with every inch of energy right down to the wire," he said.

The latest average of opinion polls puts the coalition ahead of Labor 51-49 on a two-party preferred basis, with major betting agencies giving Mr Turnbull a better than 85 per cent chance of winning a majority.

However, Labor is expected to pick up seats in Queensland and Western Australia where the swing will be highest.