The problem as I see it is the consolidation of power. Add to that instant global enforcement along with the current state of surveillance, an elite group of people have an insane amount of control.
The United Nations might not be as clear of corruption as you might think. If you've spent any time in the global public health apparatus, you probably know how bad it is (this is my exposure to UN initiatives). I don't think public health is special, and I'm sure most of the other UN-sponsored global projects have also had to line a lot of pockets.