I didn't say that no one other than executives are responsible.
I'm saying that the executives making the decisions, and being compensated for the risk/responsibility (again, this is their own justification for exorbitant compensation), are at minimum just as criminally responsible as the much lower paid person that may make the original choice.
But it's also not a given that that the lower ranked (and paid) individual is the one who has liability - they may reasonably believe the material or product design is safe, because they don't have all the information the company as a whole has, and again, it's the job of the executives to ensure that all the information the company has is correctly considered and routed to the right people, and if that doesn't happen, then the responsibility is on the executives who failed to ensure that happened.
If the executives of a company have demonstrated that they will penalize people for raising safety concerns, they're definitionally taking full responsibility for any consequences of that, including a failure to do full safety analysis in the first place. Similarly if the executives approve employment contracts that include penalties for reporting safety concerns externally they're responsible (non-executive employees aren't likely being paid enough to afford a lawyer to determine whether or not such contract terms are legal, let alone being able to afford being laid off if they're wrong).
Finally, in this case, it's very clear Philips was aware of the problems with this device and intentionally hid that information, and I really don't think that was the decision of some random low level employee. Again, before you go and blame the low level employee, if they're just being told "this is not a real issue and is being overblown" how are they expected to know differently? The lower ranked/paid someone is the higher the perceived risk of asking "are you sure that's accurate?" or similarly rocking the boat. Obviously this is on a scale (don't explicitly put this in our safety notes vs destroy all the documents we have on this issue, the latter should trigger at least a "I'll confirm with legal the exact documents to destroy and CC you" from anyone). But again, if a company is in that position, or employees believe asking about safety issues can result in penalization or termination, that's due to the actions of the executives, and so again, they are liable for the outcome.
The model you're advocating is the mob model of 'I didn't explicitly say "poison someone", one of my associates misunderstood me and went too far, but I didn't break the law'