This can easily lead to "mission creep"—the random accumulation of new goals and tasks as the organization follows funding (rather than its mission)—or to "mission shear"—direct and consistent pressure that pushes the organization systematically away from its mission and toward other interests.
Q&A with: Herman B. Leonard
Author: Sean Silverthorne
Full Discussion: http://hbswk.hbs.edu/item/5942.html