IMO, it's not just about the money, as admittedly, it can't be that much difference in the big picture. More than anything, it's like ags281 said: it's the fact that they pay somebody good money to deal with nausea like this. We, as soldiers, sailors and airmen, will b!tch about things, no matter how trivial or great.
I think the thing, when it gets down to it, is that there will always be groups that want to be "different" within the military, and will go to any length to express that difference. I'm thinking MP's wearing their new black uniforms. I'm thinking maroon berets. I'm thinking black berets (Armour Corps only, the Navy one is NOT black..... oh, who am I kidding, it's black).
Methinks that one day it will be cool to wear the OD combats because (eventually) everyone will wear CADPAT, so some people will want to go "retro" and wear the old stuff. Mark my words......