Ethical failures can be structural, not merely individual. I think the problem you rightly identify is that decision making power and ethical responsibility are delegated separately, allowing a kind of ethical-risk arbitrage. This seems to be a failure of regulation in this particular case, or in general of ethics in management rather than engineering.
Some other word than ethics? When it's not an ethical problem that you're describing.
What you seem to be saying (without actually saying it, so I have to guess) is that, because it's a failure of a group rather than an individual, it isn't ethical any more - it's something else. But if the group structure pushes individuals into unethical actions, isn't the group structure an ethical problem?
Or, for the snarky answer: If companies are corporate persons, then of course they can have ethical issues.
In a high-stakes situation fundamentally depending on innovation to provide fair value with outstanding safety, you can not drop the ball or ethics alone will not help you.
You're going to need overall integrity in addition to ethics, from bottom to top, starting with elements that are known to be lost, or recognized as not being adequate, before you have a chance to make it to the goal again.
