I’d say it’s on the conscience of people with actual conscience who decided that others have it too, and thus allowed such cockroaches to ruin wonderful systems.
There’s a wonderfully complex system of deferred responsibilities making sure that the people who actually caused this can have all the plausible deniability in the world, see themselves as having nothing to do with it, and enjoy a very relaxed life with riches we can only imagine.
In my opinion Hassan ibn Sabbah was the most perceptive libertarian in the history of this planet.
In other words, how good can be all the bodyguards these people can hire to protect themselves from retribution, in case the small part of logically connecting them to an event is fulfilled by peaceful means?