They believe these "leaders" are chosen by God, and therefore, rules don't apply to them.
Family leaders consider their political network to be Christ's avant garde, an elite that transcends not just conventional morality but also earthly laws regulating lobbying. In the Family's early days, they debated registering as "a lobby for God's Kingdom." Instead, founder Abraham Vereide decided that the group could be more effective by working personally with politicians. "The more invisible you can make your organization," Vereide's successor, current leader Doug Coe preaches, "the more influence you can have." That's true -- which is why we have laws requiring lobbyists to identify themselves as such.
But David Coe, Doug Coe's son and heir apparent, calls himself simply a friend to men such as John Ensign, whom he guided through the coverup of his affair. I met the younger Coe when I lived for several weeks as a member of the Family. He's a surprising source of counsel, spiritual or otherwise. Attempting to explain what it means to be chosen for leadership like King David was -- or Mark Sanford, according to his own estimate -- he asked a young man who'd put himself, body and soul, under the Family's authority, "Let's say I hear you raped three little girls. What would I think of you?" The man guessed that Coe would probably think that he was a monster. "No," answered Coe, "I wouldn't." Why? Because, as a member of the Family, he's among what Family leaders refer to as the "new chosen." If you're chosen, the normal rules don't apply.
http://www.salon.com/news/feature/2009/07/21/c_street/