Commonwealth Bank boss Matt Comyn reiterated the bank's support for a cap on superannuation balances, but wouldn't put a dollar amount on the proposal.
In a submission to the Productivity Commission ahead of the government's economic reform roundtable, which Mr Comyn will be attending, the bank argued "uncapped superannuation concessions appear to be unsustainable".
"We would support a superannuation cap, set at a level that encourages aspiration, and set well above the level where there is dependence on the state for support in retirement," the submission reads.
Speaking with business editor Michael Janda after another profit topping $10 million for CBA today, Mr Comyn said he would save detailed policy discussions for next week's roundtable.
Comyn: I think the principles that we set out there was that, you know, should be able to minimise any dependence on, any sort of government benefits and I think that people need to have… a comfortable retirement.
Those numbers, whether they were indexed or in and around the numbers that have been proposed… I don't think it's unreasonable for very large super balances to not be getting the same concessionary treatment that they receive.
Janda: Can you put a dollar figure on it?
Comyn: Not that I'm going to right now.
An existing federal government policy proposes changes to tax on superannuation balances over $3 million, imposing additional levies on large balances.
You can watch the interview with Matt Comyn on The Business tonight — 8:45pm AEST on ABC News Channel, after the Late News on ABC TV or anytime on iView.
And read more on the result below in the meantime: