It's because, first of all, there's no transparency. It's because there's no third independent party who is looking at a request from the government to do something that actually violates the privacy rights of Canadians in quite a major way. When the government or an agent of the state asks for the ability to tap an individual's phone line or to go into someone's sock drawer, they have to get a warrant and they need to show reasonable and probable cause why they should get that.
That requirement isn't made of governments at all when they say that they don't want to tap just one person's communications, but that they want to gather and share with foreign agencies everyone's communications. It just doesn't make sense as a matter of principle. There's no evidence that has been presented to us that it makes Canadians any safer that ministers are able to do it without a judicial authorization, so we say that it's inadequate.