Douglas said it was not just an issue for the ANZ but across the industry there had been little change in fee levels in recent years.
"Aside from when you have got a default provider coming into play ... it is hard to recall a KiwiSaver provider who has lowered their fees in recent years."
Morningstar's figures show the six largest KiwiSaver providers have 85 per cent of the market.
ANZ is the largest followed by the ASB, Westpac, AMP, Fisher Funds and Kiwi Wealth.