This excerpt taken from the CVS DEF 14A filed Mar 24, 2006.
It is well to remember that at Enron, WorldCom, Tyco, and other legends of mis-management and/or corruption, the Chairman also served as CEO. When a Chairman runs a company as Chairman and CEO, the information given to directors may or may not be accurate. If a CEO wants to cover up improprieties and directors disagree, with whom do they lodge complaints? The Chairman?