What is a central bank governor worth?

What is the going rate for a really top-class central bank governor? Or even an average one? Five years ago this question would have been impossible to answer. Central bank salaries were guarded as closely as state secrets. Furtive inquiries could only be made over drinks on the fringes of international meetings. Hushed references to million-dollar fat cat pay packages abounded.

All this has changed. The million dollar salaries are mostly a figment of the imagination, though OECD central