But you can categorically state that it's against the aims and culture of the company, and there are formal processes in place to deal with transgressions, and that you'll be happy to go through those processes in detail, with examples of why and how they were followed.

That's a rather different category of response to "Well I just can't guarantee this doesn't happen."

Of course, but that's not what I'm saying. I'm saying that some organizations explicitly create the incentive for criminal or unethical behavior, fail to setup the safeguards to prevent it, and then use the line level workers as scapegoats if they get caught.

This is significantly different than a good faith organization having some members engage in criminal behavior.

The problem with safeguards is none of them are impermeable, and so how far is it worth going with them? Safeguards aren't free.