Revenue Canada defines charities under four categories: those that relieve the poor, advance religion, advance education or those whose purposes benefit the community.
The Fraser Institute, a rightwing libertarian ‘think tank’ promoting unregulated free market capitalism (of the variety that brought down the global economy in 2008) and extremely limited government. TFI has enjoyed charitable tax status in Canada and the US since 1974.
Who doesn’t qualify?
Greenpeace had its charitable status revoked in 1989 for being an advocacy group.