Let me respond quickly to this. The deputy heads of these organizations are responsible for the cost estimates. The chief financial officers sign off on the cost estimates, and they are accountable for the cost estimates. If they can't come up with a cost—if they don't feel there is a true cost—then they will inform their ministers accordingly, that there is no cost that they can calibrate there.
On March 16th, 2011. See this statement in context.