The administrative side typically doesn't actually understand the technicality of administrating care and many times are MBA business types who administer a business as if its is commodity without understanding the true nature of the business (from their overconfidence generated from their degree and their lack of understanding the nature of the problems through distillation and non-technical understanding). This MBA culture is similar to tech/prod relationship in tech companies. Thus they provide little value add and get paid unfair amounts for their relative value.

I agree that Doctors and Nurses would likely be poor administrators - however the disparity in income is incomprehensible in healthcare.