I don't think anyone is wanting the next war, IMO more likely what has happened is around about the wrap up of Gulf War 2, people in relevant industries started to realise that there won't be that many more fortuitously sized 'sandboxable' (if I may coin a term) hot wars that profit can consistently be extracted from. So what do you do instead? Get on the surveillance gravy train. It certainly seems like a pretty good gig doesn't it? Huge amounts of government spending up for grabs, very little informed oversight or ability for anyone to argue that too much is being spent. It's a government contractor's (or a government offical taking the revolving door's) dream.
I wouldn't credit them with enough foresight to be thinking about depopulation. It's all just about next quarter's profits.