That seems very unlikely. The Herald is saying they understand charities and churches are keeping their tax exempt status:

This speculation was fuelled by Luxon and Willis refusing to confirm or deny such an idea. However, the Herald understands charities and churches will keep their current tax-exempt status.

Guess we're going to have to wait and see what their actual plan is. Wish they'd just tell us, instead of telling us they're going to tell us.