The people saying “send the CEO to jail” or “make the board liable” are vastly oversimplifying the complexity of the issue here, which is about how to enforce regulations and standards without torpedoing your economy. One of the single most important reasons why the US has such a successful business culture is because of its approach to liability - virtually all business debt can be erased in a bankruptcy, and the entrepreneur is not personally responsible. This is
not the case in many other developed countries, with one consequence being that the entrepreneurial culture there is nowhere near as developed as in the US.
https://swz.it/europes-failure-to-deal-with-failure/
And so you really don’t want to set up a situation where the operators of a company are by-default responsible for anything that their company does. Of course, that has limits and people can still be individually charged for crimes, but the point here is that this is not a by-default thing. This problem is magnified by a thousand with a company like Boeing that is so intertwined with the government and not easily replaceable.
It seems to me that the solution to this kind of issue might come from studying successful occupations done by the US - post-WW2 Japan is the one that comes to mind. The Allies (mainly the Americans) managed to defeat an enemy state, punish some (but not all) of the people it deemed to have done wrong, and then set up systems which turned out to be largely effective at putting the country on a good path. Fixing an entity like Boeing seems similar in nature, if much smaller than an actual country.