Tarion execs are almost all building industry insiders. You get the position and the pay in return for being a good loyal subject to the industry - patronage. 
Check out the Board: http://www.tarion.com/about/Pages/Board-of-Directors.aspx
Is it then any wonder that the organisation acts purely in the interest of the industry it is supposed to be regulating, not for the customers who they are supposed to serve.