The state is harmed by polygamy because these donkeys (I refuse to call them men)do not support their wives and their children. Instead, they only marry one and the rest are "spiritual wives" which means that women claim to be single mothers and apply for welfare benefits. So hardworking taxpayers support these people's progeny. And this is in addition to the added support taxpayers must provide to all the genetically damaged individuals in those communities due to the incest.