Sir Michael Cullen has called for the Government to take a heavier approach to the way it regulates KiwiSaver fees.
Cullen, who was Labour's finance minister when KiwiSaver was launched in 2007, was talking about the potential impact of a capital gains tax on KiwiSaver on the AM Show this morning when he raised the fee issue.
Cullen said the Tax Working Group was looking at ways to offset any potential impact from a capital gains tax on things like KiwiSaver.
"We don't want to end up with a reduction on returns to low to middle income earners in KiwiSaver."
He said one of the best ways of doing that was to crack down on KiwiSaver fees.