can be the backstop. The word "can" is doing some extremely heavy lifting here, against corporate practices which dilute and spread guilt and responsibility for immoral decisions so thin, nobody in the decision chain even realizes something immoral has been decided.
Is this the same argument as "please point to a moral backstop that would prevent any person from taking immoral acts"? We usually hope that people will be moral, but can't enforce this.
Have you ever been in committees approving new products or perhaps certain transactions? These chains aren't necessarily that long. But "can", sure, things could fail etc. and some places are better than others at it.