Well, there's the whole encryption hearings right now as an example. Colin Crook, head of technology for Citibank, had a great quotation in the Gleick article in the NYT magazine a few weeks ago. He said that bank security will probably surpass the requirement for military security. In fact, post-Cold War, military security doesn't inspire quite the same paranoia. It just didn't work well enough.
People do die.
In business, no one is expected to die, and the precautions taken are far more extensive as a result. Impregnability is a foolish desire. A continually decreasing breakdown is what is achievable. People dying puts an upper bound on the worst thing that can happen. It puts a limit on what you can do.