I think that people in good faith in the departments are trying to comply with the requests and then sort out the various exemptions and reasons why there would be a need for confidentiality or withholding. It could be legal advice. It could be something like evidence in a harassment complaint, evidence given by residential school survivors in an adjudication hearing, tax returns and business.... There are all kinds of reasons.
I agree with Mr. LaPointe that the onus of the law could be flipped to disclose unless and justify that, but that means you need some precision about definitions around national security, cabinet confidences and so on, but I do think the regime could be flipped over.
I do want to make the point that journalists are not the only users of the act. They are, of course, important ones. Ultimately, this is for citizens, voters and taxpayers, but the act is heavily used by brokers and resellers. It's used by lawyers suing the government. It's used by lobbyists and special interests trying to block a government initiative, or torque legislation or regulation. It's heavily used by businesses trying to get information on their competition, and it is used by foreign governments.
We can't be completely naive about the purposes of access to information requests and the need to do careful screening at some point in the process, but I do agree that it could be flipped over to an onus to disclose unless.