this is a total myth that is somehow oft-parroted on the internet.

directors/officers of a corporation have a fiduciary duty to its stockholders. this is three-pronged: good faith, loyalty, due care.

there is no such 'maximize profits' mandate in common law. See business judgment rule and Directors' duties.

if these don't clarify things, please ask questions.

1: http://en.wikipedia.org/wiki/Business_judgment_rule

2: http://en.wikipedia.org/wiki/Directors%27_duties

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edit: another poster (netcan) gave a great explanation in a sibling thread- https://news.ycombinator.com/item?id=7129582