It's not just thirsty office workers who look forward to the end of the working week. Friday afternoon has become the time du jour for government departments to publish potentially damaging documents under Freedom of Information laws in the hope that an unsuspecting media may not give them the scrutiny they would otherwise receive.

Last week, Treasury played this tactic of media management to a tee by publishing a string of documents online which revealed the potential impacts of a carbon price. The documents were published after a number of media outlets applied for their release under FOI laws.