Transparency in investment arbitration, thanks to Vattenfall suing Germany over the nuclear power exit, has become a topic in the mainstream business press. A recent piece in the business weekly Wirtschaftswoche talked about “back room justice” (“Justitia verzieht sich ins Hinterzimmer”), citing the “Toll Collect” arbitration as an example. “Toll Collect” is not technically a case of treaty arbitration, but a multi-billion dispute about a public-private partnership between the German government and Daimler, Telekom und Cofiroute.