>I think the Volkswagen episode shows that we need better emission testing mechanisms.

Code is not the problem - in this case code is just one possible loophole out of many possible loopholes.

The fix here is to make sure that corporate officers who break the law and cause significant harm are jailed and/or stripped of any profits they accumulate as a result of their actions.

This will not happen because we've set up a culture where the higher up the pyramid you are, the more you gain personally and the less you need to worry about being punished for being a bad actor. Convictions do happen occasionally, but they're exceptional, not inevitable.

You're not going to fix that political/economic problem - which is a direct outcome of free market ideology - with code review.