Think "corrupted file", not "corrupt official". The key difference is that there is a primary purpose for their existence (a file stores data, a scientific process produces good and reliable findings), and something can be corrupted (no longer suitable for its purpose) without malice involved. To call an official corrupted, you need to allege malice, to say that a file is corrupted, you only need to show that it's not valid for its purpose. It's not a good choice of a word anyway, you could make exactly the same valid point without any of the ambiguity.