When you civilianise Service jobs, you will destroy esprit de corps.
I quote from my PVR application in 1990.
My other two reasons were.
Over-reduction in budgets will make the job more dangerous - see at least 4 threads running at the moment,including snatch landies
The government is going to get us into stupid wars.
It's no fun being right in this case, you know.
Nor do I claim exclusive prescience; I know several who gave at least 2 of the above reasons on their PVRs.