The Abbott government and Labor have refused to back the Productivity Commission's call to prevent older workers from accessing their super before they turn 65.

The commission says the federal budget would save $7 billion a year by 2055 if the tougher age restriction were introduced.

Acting Treasurer Bruce Billson said the Coaltion had made it clear there would be "no adverse unexpected changes" to the super system in its first term of government. Credit:Rob Homer

At the moment, workers nearing retirement can access their super at 55, and that access age is rising incrementally, from 55 to 60 by 2025, to reflect the fact Australians are living longer.

But the commission says the government ought to consider raising the access age even higher, from 60 to 65 between 2035 and 2043, to make the age pension system more sustainable.