That is an assumption, and I believe it will likely prove true over time.
It is important to remember that departmental results reports are for parliamentarians, and they are approved by the ministers responsible for government organizations. So it should be fairly straightforward to get these documents approved.
Are you knowingly being deprived of information that may be useful to you in asking departments uncomfortable questions? That's possible. Is it just nonchalance or laziness? That's also possible. Is it a combination of all three? It is quite possible. Either way, these concerns are entirely legitimate.