But why is their heart this way?
The heart hasn't been dealt with properly.
A tree bears fruit of itself.
We follow as we are lead, or we leave, or we change the leadership.
The leadership is the problem, and it merely shows itself in many ways, on of which is the rumor mill. Lived in Detroit. Lived in small town breadbasket prairies. The problem is the heart, no matter the issue, be it gossip, sexuality, addictions, abuse, leadership, etc.. They are all manifestations of the state of the heart. What you have is what shines forth and what is born in your life. As a leader, that is true of those under you, hence the injunction for leaders to have their own family in order, amongst other things. Just as in raising children, get the heart, and you have the kid and all else falls into place. Do this with the flock. Few pastors there are who actually do this. Raised with pastors. Raised at a bible college. Friends are pastors. I've lead for a number of years now. I see no exceptions to this, for it is impossible to hide the state of the heart. Impossible.
Some have mentioned church discipline, or the lack of it. Yes, that too, shows the state of the heart, for the leader who doesn't discipline, according to the Word, doesn't love the flock. Period. I find that almost all with vehemently disagree with that, but hey, scripture states this to be true, for who has a son and doesn't discipline him, it asks? It then states that to not discipline is to not love. The church has been raised on a perverted sense of love. Just look at the general posts in which they negate so much of the Word by saying that God isn't that way, simply because He is love, and nothing else. We have slit our own throats, and sad it is when few stand up and preach the gospel and the Word and the justice and punishment and damnation that God metes out. We have a lopsided gospel, that is almost powerless -- just look at the church, with gossip being a tip on the iceberg that sinks the unsinkable titanic.
Deal with the heart. And nothing else. And all these things will be added unto you by Him. Amen.