You cannot reasonably support Medicare and claim that Anthem was doing something unconscionable, because Anthem was adopting Medicare's own policies.
Medicare's admin cost ratio is a function of who it covers. Somewhere in the comment history on HN, there's a short writeup I did of how the math works out if you extend Medicare to the whole population; the admin overhead, for obvious reasons, shoots up --- people pay the same amount of money but require far fewer services, reversing the "advantage" Medicare has in the metric currently.