AMP chief executive Jack Regan is not concerned about losing a portion of new people who sign up to KiwiSaver through the default system.
The country's third largest KiwiSaver provider this morning announced it was merging the two schemes it operates - the AMP scheme and the AXA one it took over after acquiring the business.
The closure of the AXA scheme means AMP will no longer soak up a third of new KiwiSaver members who do not chose a scheme and are allocated by the Inland Revenue.
Instead it will get one in five new default members.
Regan said there was still significant opportunity for driving further growth in KiwiSaver with forecasts by Treasury estimating it will be worth $60 billion by 2021, up from its current $13 billion.