Hiding to nothing
We, the human race, have access to precisely 1.0 electromagnetic spectra. It is a strictly limited resource which cannot simply be extended at will.
We seem, though, to be able to "use" (if that's not too serious a word for some of the "uses" we see proposed) an exponentially increasing amount of spectrum.
To put it bluntly, then, neither the FCC nor our own non-regulator Ofcom can simply collect the cash from an endless stream of would-be "users" of the spectrum, much as they would no doubt like to do so. There simply isn't room for them all. If these "regulators" are truly incapable of distinguishing between services genuinely useful to society as a whole, which clearly deserve spectrum space, and the commercial froth which wants to overfill the spectrum with seventy seven shades of timewasting tat, which are at best optional extras, then it's time for them to do the Darwinian thing and become extinct, to be replaced with something which is a little more in touch with reality.
In short, as long as spectrum "regulation" is conceived of as some sort of market activity, where they get to flog spectrum to all comers, they are on a hiding to nothing. They cannot succeed. Their model is inapplicable. Instead of pleading for clever ideas to cram as much crap as possible into our 1.0 spectra, they need to prioritise allocations according to socially determined criteria, rather than according to which commercial entities can stuff the most greenery into their coffers. We live in a limited physical world, guys, not an indefinitely expandable free market. Get used to it, or go.