"Investors who have watched their nest eggs melt away would be shocked to know that former executives of companies involved in some of the USA's largest cases of corporate malfeasance -- Xerox, Waste Management and Sunbeam -- still serve as senior executives and directors at public companies," writes Matt Krantz. "Some even sit on audit committees, acting as watchdogs against accounting deceit. In one case, an ex-president's involvement with alleged fraud isn't even disclosed in his current employer's regulatory filings."