Sanitarium are not a charity. I've explained a bit more in another reply here.

In my view, there is nothing wrong with a church having charitable status. However, this status should be based on their charity, not based on them simply being a church.

Hell, we could apply the marae criteria to churches:

b) a marae has a charitable purpose if the physical structure of the marae is situated on land that is a Maori reservation referred to in Te Ture Whenua Maori Act 1993 (Maori Land Act 1993)and the funds of the marae are not used for a purpose other than—
(i) the administration and maintenance of the land and of the physical structure of the marae:
(ii) a purpose that is a charitable purpose other than under this paragraph.

And I'd add a charity should not be allowed to donate to political parties or encourage their members to. A charity should be non-political.