Being a nun or a monk does not change their true character, when they are still a lay people, they have been very mean, sneaky, selfish all the time, even after ordained, their character will remain the same, the only thing that can make them change is the dharma they have learned and apply it in their daily life, so, obviously they are not complying what they have learned.
As from the action are by individual, so not all sangha are like that, some will transformed fast but some will not, so for those who are not, they will do something very obvious to attract attention and to show that they are doing their practice very well by following the what Dalai Lama said, this could be a way to cover their weaknesses.