The National and provincial governments of Canada as well, as the UN and 69 other nations, allow it to have a budget of almost $17 million. Eisenhower wisely warned of this. "Give me the answers I want and you get the goods, nice place you've got here it would be a shame..."
Just because it is funded by governments and the UN does not make it legitimate, of course. 
https://en.wikipedia.org/wiki/International_Institute_for_Sustainable_Development