What you are talking about broadly is Control Fraud[1]. One of the most startling things about mainstream (neoclassical) economic theories is that they implicitly make the assumption that control fraud doesn't exist[2]. Yet it has been the cause of many recent high profile crises [3][4][5]. So when you see people talking about how insider trading can't ever be bad, and how executive interests are always aligned with public good, keep in mind that those people are living in a fantasy world where Enron never happened.
[1] https://en.wikipedia.org/wiki/Control_fraud
[2] http://neweconomicperspectives.org/2013/07/discrediting-regu...
[3] https://en.wikipedia.org/wiki/Savings_and_Loan_Crisis
[4] https://en.wikipedia.org/wiki/Enron
[5] https://en.wikipedia.org/wiki/Worldcom