All those responsible should pay, especially those whose job is to supervise and enforce regulations. However, establishing who's to blame is difficult when there's no political will to do so. Politicians know only to well all they have to do is wait until the uproar dies down, media, social media, Steemians move on to other topics and then it's business as usual.
In Romania, a few years ago there was a horrendous tragedy with newborns that burnt to death in a maternity ward. Who paid for that unspeakable horror? Why, the nurse who was on duty! Not the politicians that had ordered massive layoffs so there was not enough personnel on the ward. Up to this day, hospitals are still understaffed.