cfloryan
Here
There's no need to create a whole bureaucracy just for this... there are lots of companies with the resources and experience for running toll roads/toll collection. For instance, the London and Stockholm charges are operated by IBM. 407ETR or another similar company could do the toll collection here.
Like TOareafan said, whether you insource or outsource toll collection you still end up having to pay for a bunch of toll cameras and a room full of people to collect the bills.
And mostly irrelevant but I can't help pointing it out anyways: IBM designed and coded the Stockholm and London systems - they don't actually operate them.