I have a quick answer to that. You used the word “blame”. If inquiries into why things have gone wrong are looking for blame, then people of course don't speak accurately because they don't want to put in evidence that leads to it being put on them.
In the recommendation that I've made—and our minister actually took it with regard to one of our major programs that did go wrong—accountability should be asking people what they decided when and why, and seeing what grounds they had. Generally speaking, people do not go to work thinking, “I'm going to wreck this project.” In order to make things better, you have to understand why people did things, why they decided what they did and on what grounds. That means that you are not searching desperately for blame; you're searching for understanding. If you do look for blame, you will not get good understanding.
That doesn't apply if you have a corruption issue. I'm just talking about the regular processes that we've been discussing so far.