The access to information system was the subject of a 2002 study by a government task force. In this study it was learned that the government spends approximately $800 million on communications. That's the government generating messages it wishes the public to pick up about its operations, policy, and programs.
We do not have—though it would be interesting to discover—the budget across government for processing those 25,000 access to information requests. But I would suggest that it's far inferior to the $800 million spent on what some might uncharitably describe as “spinning”. This, nevertheless, is a constitutional and legal requirement—providing information when it is requested.
An important part of the issue is this: people are frequently ill-prepared to manage this volume of work, as Colonel Drapeau was saying, and the whole system is seriously under-resourced.