I never really get why bosses are allowed to sell stock in their own company whilst there still employed with it. Actually I would also set a limit that you cant sell your shares until you've been away from the company for more then 5 years.
That would mean you cant pump and dump the shares, you cant co-incidentally schedule a selling of your shares to happen a week or so after a brand new product comes to market, or before you announce something causing the shares to dive. You are stuck with the shares for good or bad. And you have to leave the company in a good enough position, and with a good enough person at the helm that your shares will still be worth something in 5 years time.
That would certianly provide incentive to make good decisions for the company and for its long term future. Still cnsidering how greedy the twats at the top are, something like that will never happen...