Just to clarify an earlier point made by another poster:
[/quote]But ideally, and if we can overlook those NEA grants, public radio is libertarian. People are choosing to pay for something we enjoy.
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You might choose to look at the public broadcasting business model as "libertarian," but do realize there are no NEA grants involved in station operations. Perhaps you're confusing the National Endowment for the Arts with the Corporation for Public Broadcasting, which is an independent, non-profit agency which filters federal grant monies to stations and producers, based on very specific performance and mission criteria.
The non-commercial model for NPR-type stations (as opposed to high school, low-power, and college rock non-commerical outlets) involves many different layers of funding, which all work together to make things happen. No top-down decision making comes from Washington DC, and each station has its own internal culture and priorities. Which is why there's room, heck, I'd say even a need, for more than just one or two non-comm radio outlets in every market. Especially in larger markets like Seattle.
For a really interesting market scenario, albeit a small one, look at Juneau Alaska. A couple of years ago the major commerical broadcaster in town turned over their two FM licenses to the sole non-comm FM/TV broadcaster in town. Now, KTOO operates three distinct services on three viable FM frequencies: 1) all talk/news, 2) mixed format music and volunteer DJ shows, with a large classical block afternoons, and 3) a AAA-rock/alt/oldies music mix. Not suggesting that the same should happen everywhere, but that radio, as a medium in many markets, would be enhanced with a little more of this type of creativity that encourages new programming ideas. Especially when it tried to reflect something "unique" about its own market and what may work there.
By contast, it seems most commercial broadcasters can only recycle a few "tried and true" ways of running a handful of mass-appeal formats, regardless of how many frequencies they now control in each market. I think it's fine to have a dozen or so stations doing what we get now. But I can't imagine how that's good for the future of radio as a medium to have so little creativity on so many overly-predictable stations, or to keep others who don't need agency ads to survice from gaining access to existing radio licenses that actually cover the full metro market.