I have many friends and family that have participated in Iraq II and Afghanistan. They see PMCs as morale destroyers. While they are getting paid E-4 rates, or higher, the PMCs are getting paid 4-5x that for doing the same damn job!
They've had to learn to do more with less while the PMCs show up with shiny new toys all the time. And if that wasn't enough they were getting calls or letters from home saying their benefits had been cut, allowances were down, etc. Then the DoD was "winding down" it's campaigns by replacing enlistees with even more PMCs. Suddenly, guys that wanted to make a career in the armed forces, and had planned to stay 10-20 years, couldn't re-up. In the end few of them felt they had no choice but to join Academy or Blackwater since job prospects back home were so meager.
They were making things so much better in Iraq the PM wanted them out of his country because of the unaccountability and civilian deaths directly attributable to them. Shooting civilians in the street is the first thing I think of when the word Blackwater comes up.