Should superannuants who are still earning big bucks in retirement pay a special higher tax rate, to cut the cost of pensions?
That's one idea up for discussion in a three-yearly review of retirement policy being carried out by the Commission for Financial Capability.
Super currently costs $39 million a day and that could rise to $120 million in the next two decades.
The proposal could see some over-65s paying a top tax rate of 39 percent - higher than the current top personal tax rate of 33 cents in the dollar - in a bid to bring the bill down.
Lisa Owen asks Interim Retirement Commissioner, Peter Cordtz, how exactly it would work.