HSBC: Should the directors and executives be "banished from the City"?

In issuing an apology letter and statement that HSBC has been completely overhauled, Stuart Gulliver, chief executive, has put a stake in the ground. He wants to move on. Some may argue that more needs to be done because accountability and consequence are important foils to anarchy and chaos. However, the sentiment underpinning Gulliver's message is an important foundation of civil society: that sooner or later communities need to respond to scandals, make adjustments, and then consign them to history.

With this in mind, should the directors and executives of HSBC be "banished from the City"?