America's use of PMCs is as old, actually older, than the country itself. Many of the issues that led to Blackwater's infamy from their time in Iraq were directly caused by State Department incompetence (I doubt anyone would want to argue that the US State Department is an efficient, well-run, non-politicized entity). Erik Prince is not some crazy Christian zealot out to wage a holy war; if anything, he provided the US government with unique capability that they desperately needed, and things would have probably been far messier if he hadn't been involved in Iraq.
I see nothing evil or nefarious about a defense contractor commissioning efficient tactical aircraft for anti-terrorism and civil defense operations. The fact that it's Erik Prince, and the mass media has painted him as the evil overlord that caused all of our problems in Iraq, doesn't make it any different. It would be strange if someone who was highly competent and specialized in defense operations, who had enough money, WASN'T building these sorts of things.
Look, I'm mad about what the US government did in Iraq. Everyone should be. We shouldn't have even gone there. But none of this is Erik Prince's fault.
Venture capital firms have "scouts," giving them access to deals they'd otherwise overlook or couldn't access. The US defense and intelligence communities have people like Erik Prince.