I'm not sure I've said it before, but Critical Intel is the best column on The Escapist. The research is impeccable, and it's rarely less than fascinating. You're doing great work.
Speaking as a UK resident, the whole thing about G4S having a private army of 600,000 people is especially laughable. The London Olympics are only the most prominent example of them screwing up lately, and they've failed to deliver on what they were hired for over and over again in the last couple of years. Even really small-scale stuff has proved beyond their capabilities alarmingly often. If the disorganisation they've demonstrated in the last few years is anything to go by, I don't think we need to worry about them "taking over".
I do find the idea of PMCs pretty alarming, though. I sort of understand the necessity on a theoretical level, but I don't like the idea of one person having access to large-scale military capability. If you're the sort of person who wants to be in charge of a private army, you probably shouldn't be allowed to be in charge of a private army.