It is rare that an organisation, in any walk of life, is not successful without patience, time, confidence in the process that it is implementing, and the freedom that continuity and security brings.
Bill Belichick is free to make almost decision he wants in New England because of the job security that he has there. Oftentimes, sporting franchises are ruined when those in positions of influence and power are forced to make decisions simply to save their skin. They are not looking to better the organisation. They are simply hoping to last one more day.
That uncertainty and insecurity breeds selfishness, naturally, and it frequently leads to infected organisations.