I think the Air Law / Performance comment is a bit of a red herring as your average military pilot should be able to pass those exams after a couple of days of swotting and still have a better working knowledge of the subject than a civvy abbo who's just done 6 months of groundschool but has no flying experience.
In my opinion the overall level of piloting ability required to qualify for wings is far in excess of the CPL standard (and I feel qualified to comment as I've done both). The hoops that must be jumped through and the associated expense for a mil pilot to gain an fATPL is unfortunate when you consider that the frontline military pilot has demonstrated a far greater level of competence and experience than the dozy 18 year old who is reluctantly pushed towards the licence by his daddy (of which there are many). A CPL for the appropriate 'stream' of aircraft would not be unjust. However, it's not going to happen so we needn't get our knickers in a twist over it.