> You wouldn't call it efficient if a government came in and decided
That is what happens for every natural resource. Your gov establishes rules for land and ground water just like that. Actually, even for IP and patents...
I don't see how you get from "gov regulated process of resource allocation" to "gov enforced monopolies". Yes, we should care about the value generated to consumers. The theory is that companies use exactly this money from consumers to get the spectrum.
> There are alternative solutions - like opening up wide swaths of spectrum to smarter devices that are able to share that spectrum broadly.
That only works with strong regulation (I'd guess you don't want gov involved in details?) or in situations were cooperation will always win out. Otherwise you'd usually end up with with some kind of Tragedy of the commons / Prisoner's dilemma like situation. Like every neighbor here upping their WLAN power...