Dan Ariely's books offer some good examples of organizations leaving metaphorical hundred dollar bills lying on the ground, and refusing to pick them up even when they're pointed out, apparently out of sheer inertia habit. I'd be more specific, but it's been more than a year since I read any of them, so I've forgotten most of the details. I'd suggest checking out Predictably Irrational and The Honest Truth about Dishonesty for some good examples.