The contentious superannuation guarantee increase from 9.5 to 10 per cent will go ahead later this year.

Treasurer Josh Frydenberg told Chris Smith a decision has not yet been made as to how the change will be implemented, including whether Australians will be allowed to opt-in or opt-out.

He said the government remains focused on other changes, such as reducing fees and increasing competition.

“Anyone who denies there is a trade off is effectively a flat-earther, because it obviously is coming out of people’s wages.

“We’ll continue to assess that superannuation guarantee legislated increase.”

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