A warning there'll be problems, if no changes are made to superannuation.

Outgoing Treasury boss Dr Caralee McLiesh has made it clear there's a need for a Capital Gains Tax and changes to super, as the population ages.

She points out an increasing share of Government transfers are going to the wealthy.

Former Reserve Bank economist Michael Reddell told Mike Hosking there's a need to increase the age of eligibility.

He says however, it could take another crisis for someone in elect policy circles to make the move.

LISTEN ABOVE