Compare and contrast
A couple of years ago, when freedom of information was coming into force, I attended a talk given by one of the police officers centrally involved in formulating the police response to FOI. I can remember he pointed out that some chief constables had started releasing their personal expenses, added that others weren't so happy about the idea, but predicted that the power of comparison would force all of them to follow.
And it is true that if you search on 'chief constable expenses' you will now find data from many police forces on how they have reimbursed their boss for spending on train fares and hotel bills incurred in the course of duty.
But not all. One which doesn't seem to be providing this information yet is the Police Service of Northern Ireland, despite its stated intentions. And given the other recent developments relating to the PSNI Chief Constable Sir Hugh Orde, this now seems to be causing a little local consternation.
Perhaps this consternation will achieve what comparison hasn't.