If you have a terrible soldier in a Tier 1 unit and you are trying to get rid of them via transfer to another unit, when asked why he is transferring you can just say "sorry, that's classified". The receiving unit then has no idea of the problems associated with that soldier.

As a federal system administrator I face up to 5y prison, if I misuse my permissions. (And I do not carry a weapon.)

Why would any police force be so negligible if I comes to punishment of crimes in their own ranks?