Some well-connected individuals on both sides of the border must have gotten very rich after the terms of this "deal" went into effect - which is the real purpose of all of these giant free trade agreements.
Even Canadians don’t like them. The purpose of the dairy tariffs and the marketing boards is to make consumers pay more milk and milk products. Just think medallions in New York for taxis. The marketing board keeps down supply numbers to keep prices up, barring any new entrants into the market.