Ethical boundaries in business

If Enron had a lengthy code of ethics, which it did, exactly what happened to ruin their reputation?

Share your thoughts on the below link on the "World's Most Ethical Companies in 2016". Are you surprised by the list? Why are U.S. companies so far down the list?

http://www.forbes.com/sites/karstenstrauss/2016/03/09/the-worlds-most-ethical-companies-2016/#22b1238f73dc