Under the Central Tibetan Administration (CTA; Tibetan leadership based in Dharamsala), one might be surprised that financial mismanagement, embezzlement, murder and sex scandals have always been common throughout the history of its existence.
Many monks and lamas have been accused of or admitted to sexual impropriety, or taking advantage of their positions to have inappropriate relationships with their students and women in recent years but cases like this were pretty much unknown to the world since Tibet was very much contained themselves in the mystical Shangrila. To make it worst, all of these lamas have not been sanctioned by the Tibetan leadership and, in many cases, have enjoyed the continued endorsement of the Tibetan leadership in spite of the allegations, the most recent ones being Sogyal Rinpoche, Sakyong Mipham, Gangten Tulku, Lama Norlha, Lama Choedak Rinpoche, Tenzin Dhonden and etc. The reason is very obvious, they do not practice Dorje Shugden and hence whatever they do is excusable because they remain financially lucrative for the Tibetan leadership.
Take Sogyal Rinpoche for example. He was often pictured with beautiful women and is obnoxious in keeping a harem of women. In spite of decades of allegations of sexual abuse, he was able to continue unchecked because the Tibetan leadership endorses him and keeps his act of impunity until recently. Imagine he has not faced any repercussions from anyone because he doesn't practice Dorje Shugden. While the Tibetan Leadership and their supporters harass Dorje Shugden practitioners for peacefully practicing their religious freedom, the Tibetan Leadership says nothing about Sogyal Rinpoche and many lamas who are consistently and constantly accused of abusing their students.
This is just one of the many classical cases we see where criminals are allowed to run free as long as the Dalai Lama is being sent to their centers for pictures to be taken in exchange for lucrative donations paid to the Tibetan Leadership.