You're not always talking about the evil government and your corporate Boogeyman?
Because the active army is overextended and US planners would rather employ professionals to perform security tasks. It frees up US troops for 1) more relevant duties and 2) allows fewer troops to be deployed. is that not obvious?
Again, Blackwater was not tasked with combat operations and US troops don't need any help tarnishing our image.
Straw man. No said they were "pure". US troops aren't either.