As has been well-established by now, KiwiSaver has become mainly a plaything of the banks.
According to my back-of-an-envelope calculations, banks manage about two-thirds of KiwiSaver funds (and that would head up to around 80 per cent if you include the recently-merged Tower/Fisher operations that now has TSB Bank on board as a major shareholder). Only the combined AMP/Axa behemoth provides any kind of substantial resistance to the bank stranglehold on KiwiSaver, claiming around 15 per cent market share.
Distinguishing AMP/Axa in this way is a technical nicety, really: AMP (inclusive of Axa, although that brand name has now been wiped from official consciousness and physical expression), like our banks, is a huge Australian-dominated financial institution with a strong, tightly-controlled distribution force.
However, since BNZ launched its own scheme this February, AMP's distribution reach into KiwiSaver has been somewhat diminished. Previously, BNZ sold both the AMP and Axa KiwiSaver schemes (one to personal and the other to business customers) through its network.
This was always a slightly odd situation, and one that turned weirder after the National Australia Bank's (BNZ's owner) do-or-die battle with AMP for the hand of Axa a couple of year's ago.