Large and complex systems are fundamentally unpredictable and have tradeoffs and consequences that can't be foreseen by anybody. Error rates are never zero. So basically anything large enough is going to kill people in one way or another. There are intelligent ways to deal with this, and then there is shooting the CEO, which will change nothing because the next CEO faces the exact same set of choices and incentives as the last one.
I'm not talking about unpredictable tradeoffs and consequences.
I'm talking about intentional actions that lead to deaths. E.g. [1] and [2], but there are numerous such examples. There is no plausible defense for this. It is pure evil.
Pretty predictable what happens when you deny coverage for a treatment someone needs
Well, given what you said, one obvious mechanism is to cap the sizes of these organizations so that any errors are less impactful. Break up every single company into little pieces.