I can speak from first-hand experience, I used to be sales supervisor with a multinational corporation and I was for four and a half years a member of CAW and whatever the paperworkers union is called. We had a strike in 1995 and were not allowed to see the final agreement. The union representatives told us it was a good deal and gave the context overall and said we should support it. I said it was my wife and my family...and I'd like to see the agreement before I sign off on it, but we weren't allowed to. I can only speak from first-hand experience about how that happened.
On November 19th, 2013. See this statement in context.