The simple response is that political staff members are not told to do anything related to an access to information request. They're told to let decisions be made by the members of the public service who have received delegations of authority under the act, and that's it. No political staff member has received a delegation of authority under the Access to Information Act; therefore no political staff member has authority to make an access to information decision.
On April 13th, 2010. See this statement in context.