I missed something - maybe a lot!

Rating: Null/10 (18 August 2006)

Will somebody please tell me why Jodie Foster deserves a fat check for her services? She accomplished nothing. In fact, I fail to understand why the Inside Man bothered to let her in? Curiosity? He told us up front that this was a perfect heist, didn't he? Why would he jeopardize his plan by allowing an unknown quantity in the mix? Presumably, she convinces Chris Plummer that the Inside Dude would eventually collect his ransom at a later date (and not expose Plummmer) but is that the Inside Man's goal? Not clear.
The Insider leaves a calling card in Denzel's pocket at the end. Is that to confirm the success of his plan or is he instigating Denzel not to give up the quest for the Insider's long range goal. Jodie looked none to happy when Denzel "indicated" that he planned on doing just that. Is there a sequel on the drawing board?
Any help out there?