There are many advocacy groups that have goals, such that, if and when their goal is achieved, they would essentially become obsolete and have no need to exist anymore. Hence, there is something of a conflict of interest between a group's stated goal and the generic unstated goal of advocacy groups, i.e. perpetuate their own existence indefinitely. Thus the desire for fundraising might override the desire to be most effective in achieving the stated goal.
I swear I've heard a phrase for this situation before, but it escapes me, and I have been unable to come up with a set of search terms that don't get flooded with unrelated information.