I believe the problem is more political.
Boeing is a large employer in many states. Getting to the bottom of these issues run the risk of putting this giant into the ground. The District Attorneys and senators that were on watch when this takes place are unlikely to get re-elected.
So it won't happen.
I also find it interesting that skilled engineers are paid much, much, MUCH less than unskilled CEOs. (even when said CEOs are relieved of their duties)