I would come at this from a different angle in that this is just a subset of the hugely problematic tax free status of most charities, universities and churche

I would come at this from a different angle in that this is just a subset of the hugely problematic tax free status of most charities, universities and churches, rather than a thing unique to mormons. Amassing a large pot of tax free money is not good for society no matter who is doing it for very obvious reasons.