My money is on those three HMMWVs having been the maintenance nightmares for that unit, and someone slipped the riggers a case of beer to make sure they didn't have to dick around with them, anymore.
One of the funnier moments I had as a platoon sergeant was having to tell the "new guy" squad leader I had working for me that, no, this isn't 18th Airborne Corps, and no, we can't just "burn these POS trucks in on the next jump...". The forlorn look on his face, as he realized that a.) he wasn't Airborne anymore, b.) he was in a unit with no budget, c.) the rest of the Army didn't have the ability to write off equipment instead of fixing it, and that d.) he was likely to spend more time on police call than actually training, due to the aforementioned facts.
It was always kinda sad, when getting in guys from units that actually had budgets for training. Once they realized we were essentially paupers, and that the post headquarters thought we were there mostly to fill their manning rosters for post support missions... Yeah. Half our drinking problems in the mid-grade NCO world started there.