Trust is like a bullet proof vest. It's expensive, it takes a long time to build and if you don't build it well it won't be nearly as strong as you thought it was. A bullet proof vest is big, like a whole organization.
In this metaphor a bullet is poor morals, untrustworthy, the cheap and short-cut path. A bullet is small, reckless and destructive, not just to itself.
The challenge is building the right bullet proof vest for the bullet that comes your way, because there is always a big enough projectile (an Enron sized scandal) that could take you down.
Point being: trust isn't a given, it's developed day after day after day so that when the [Takata airbag or VW emissions] mistake comes you don't go the way of Enron.