Opposition leader Bill English says the Government is playing politics with its "brutal" blanket approach to the health sector.
Health Minister David Clark told Radio New Zealand this morning that he is looking at replacing the chairmen of District Health Boards that are not "on the same wavelength" as the Government.
He was "very seriously considering" asking for resignation letters from each of the 20 DHBs, but added that the current political appointments "by and large have shown themselves to be very competent".
Health ministers can appoint the chairman, deputy chairman, and up to four members of each DHB board.
English said that the only time he could recall asking for resignation letters was during the health reforms of the 1990s, when everything had to change.