[parsimo2010]

If the prospectus says "follow the S&P 500" the fund manager is also not interested in long term success, they are interested in tracking the index.

But the fund managers tracking an index are not the main problem, they are just putting a lot of passive votes behind the funds that are actively working on electing board members in the interest of short term growth/profit (which brings more people to invest in their funds and gets them big bonuses).