That's the thing. You are working ATC for the government, knowing that you have no real competition for your job; that is, no other entity is going to surpass you in the marketplace to try to drive your company out of business. So, you do your job, but is there an incentive for doing your job better or cheaper (or management's favorite buzzword "more efficiently")? Probably not. You go in, do your job, and leave. Besides, ATC is one of those things that is so procedure driven that you can't really make real-time innovations; it's not like an assembly line - you have to things this certain way or safety is compromised.
But it is like the Bobs in "Office Space". I think the central idea is to put the existing ATC on the defensive with the threat of possibly losing their jobs, and that makes them look at how to do things more efficiently.
Regarding "corporization", a corporation is profit driven, and so I don't see how that can be an effective model for ATC. It sounds like the bottom-line with this is to try to shake-up management; but to completely privatize or corporatize ATC will likely cause more problems than it will solve and end up costing more in the short-term without likely causing much of an impact in the long-term without impacting the existing services or safety.
But, I still believe the threat of privatization is likely to yield some results. Any time you stop and ask "Hey, is there any way we can do this better?" you are going to see some impact and improvement in efficiency.