When you work for a big organisation, anything can and probably does happen. And this would not be an isolated incident of possible wrongdoing's. In most cases its takes a long time to find if errors have been made, and then it takes even longer on how to return any losses, if at all!.
One thing I find rather strange about this incident, which is perhaps similar to one that is being investigated with one of our local council leader's, is how the leader's never seem to know about these things until it is brought to their attention. Perhaps the public are paying council leaders and councillor's far to much in 'allowances'. I mention 'allowances' because apparently they do not get wages for the work and long hours they do and provide for the public?.