The fact that it will not fit easily into an Excel spreadsheet does NOT change that fact. Businesses that indulge in outsourcing based soley on a overly-simplistic bottom line of a spreadsheet will end up incurring costs that will hurt them competitvely.
And it WILL swing back, when delivery dates are missed, dollars are spent on additional resources to compensate, infrastructure is mismanaged and not fixed in a timely fasion, when the agendas of the outsourcers are foisted off on the clients, etc - management will get tired of it. After going through a few different outsource providers, and dabbling in offshoring, they'll get it. This madness may take a long time to play out, as people are rarely willing to admit mistakes. It will happen, though. (Again, except in companies that have fundamental problems or resource/budget constraints - those that NEED to 'outsource a kidney via dialysis')