In engineering we have something called "engineering safety philosophy" which should be forced feed/read to the economists and politicos of the world before breakfast every day of their lives.
Its all pretty simple, you look at a design of a system and work out the weak points and make sure that in the event of failure those weak points don't bring the system down. Its why planes very rarely fall out of the sky, and when they do it tends to be human error rather than engineering error.
I recommend you read this, and the link to the transcripts at the end.
The Solutions were simple, the systems had worked as one whole and given the pilots the extra controls that were needed, and still the plane was pretty much flown into the sea.