Only in Britain are we so stupid. Britain has established an Armed Forces reserve of ~40,000 (inc. RNR, RMR, RAuxAF) and has managed to generate widespread public knowledge of what the TA is - tell someone you're in the TA and they will have at least a general idea of what that is. Now there is an idea being mooted that it's sensible to cut that number in half.
While everyone's caught up in musing over what the uses of such a large force are, nobody is considering the effects the cut will have on two things - public awareness and recruiting. For one, if you lessen the "footprint" - as the popular term seems to be - of TA units in a large region of the country, this will have obvious ill effect on public perception of the Army in that region (the army, particularly the TA, will become ever further from the public psyche). Secondly, through that lack of awareness, recruiting will be hampered greatly - if you want 15,000 gung-ho part-time soldiers eager to fight in wars that the British public don't care about, then you're going to have to look far and wide in that British public to find the people you need. To look far and wide you'll need TA units everywhere - exactly as the system is now!
Is it not clear that the system needs spare capacity, and our regular forces are currently suffering for the lack of it?
Cut back the numbers enough to the point that large numbers of servicemen leave the military out of dejection that their careers are going nowhere, and you will quickly have very few young men left interested in the defence of the United Kingdom.