They are, in most cases, legally required to place shareholder value over all else.
http://www.washingtonpost.com/opinions/harold-meyerson-the-m...
Until they are ready to cash out, which might be as soon as a year away. It needs to be redesigned with long-term incentives in mind.
Because it seems that generally isn't correct as viewed by the law (i'm not a lawyer blah blah...).
However, good luck when the shareholders sue you to try to recover their loses. That's the real meaning of that threat.