that work shouldn't be double checked. But a CFO, CIO, or even a CEO, shouldn't be the ones doing it. They should be getting reports that have the statistics on the error rate. A lower level manager may double check some of this stuff himself, but the higher up you go, it would/should happen less. And I would venture a guess that the people on your team want to work harder and are willing to make more of an effort. Hypothetically, are you going to double check your own work if you know that it's always going to be checked by another set of eyes? But if you know it all comes down to you, are you going to make sure that your final product is as perfect as you can make it?
A good employee would do his/her best. But even the best, when "managed" wrong, will do less than they are able.