I'd just like to point out that there's a fundamental difference between air and rail, in that air has a lot of competition and it deals with the public up front.
If planes fall out of the sky, people will flock to another airline. If trains derail, for the most part the only ones affected are the grain growers and the public in the one-mile radius of that derailment—for the most part. They can certainly impact a lot more. Yet the grain customer was screaming the loudest during the strike in 2007 at CN, and yet they're the ones who lose the product. And in any case, they can't go to another competitor, because the lines aren't there. So there's the fundamental difference.
Airlines want to have a safe management system because of the interaction with the public, which the railway doesn't have that focus on. VIA does; it's all public. CP does because they probably recognize that it's financially beneficial to them. CN doesn't recognize it whatsoever. Mr. Reason's safety culture does not exist.