Mervyn King's speech on Tuesday in Edinburgh is one of the most important given by any Bank governor in recent years. Touches of desperation and deep anger flick through the prose, and rightly so: frustration and anger above all at the lack of reform. King calls the scale of support for the banking system "breathtaking" - a trillion pounds, two thirds of the output of the entire UK economy, in the UK alone. "Never in the field of financial endeavour has so much money been owed by so few to so