Granted, TMZ appeals to the least common denominator, which unfortunately, there is a large market. This is why commercial radio airs what it does (same for commercial TV). They've got to keep their customer (the advertiser) happy. Understand that the listener is not the customer, the advertiser is. The listener is the product or the target the advertiser is trying to draw to hear their spots. So if playing mindless drivel will bring the audience that advertiser is seeking for his/her product, they'd air mindless drivel. If a Polka 24/7 format brought in the desired demo for that station's advertisers you'd be hearing WPLK all polkas all the time !!!
I don't agree with you that if NPR thought they could get donations with TMZ they'd air that. NPR however, does have to follow the donor money. Many of you have major problems with NPR or PBS getting the small amount of money they still get from Uncle Sam (they used to get much more in the early years, I believe). So no NPR is not the BBC, because the BBC is totally financed by the government. NPR does offer programming that commercial radio has forgotten. They offer the long form newscasts and news magazines, plus other shows including music that has left the commercial radio airwaves. NPR is local as well as network. That of course does depend on your local NPR station. Local programming is costly. My guess is, the reason fewer NPR stations offer Classical Music is they are finding far less financial support, in some markets, and had to either cut back or drop it completely (by the way, I am a regular listener to my local NPR stations, WRTI which plays both Classical and Jazz, and NPR news/info WHYY-FM which does air locally produced programming as well). However, my two NPR stations are in the nation's #8 radio market(Philly) along with my hometown market #76 (Wilmington DE) so they have a fairly large audience to draw upon for support. A smaller market, might have problems making ends meet and have to adjust what they are doing.
Remember NPR and their affiliates get less than 10% of their money from the Feds, so they don't have a guaranteed source of money any more than any other station, be they non-comm college, non-comm religious, or commercial stations. They too have to pay their bills or go out of business.
As far as high school radio, sorry, we didn't have that when I was a kid and generally only the well to do high schools can afford such a luxury, sort of like having a swimming pool or a planetarium at your school (my high school didn't have any of that stuff, but schools in the better "healed" parts of town sure did). I worked many years as a part timer on weekends (stopped about 4 years ago after over 30 years of doing this as I've also had a great career in industry as a lab tech), I used to practice in my bedroom as a kid and taped my self with a battery operated toy reel to reel tape recorder, being the jock, and doing the news, etc. I'd re-write the news stories I found in my local hometown paper and do my own newscasts. So if a high school kid really wants to do radio as a kid, they can get plenty of practice doing it themselves minus the audience. Of course they could scape together some money (kids today have far more money than we all had) to start their own internet station. However, given the state of the radio industry, I'd not be encouraging high school kids to consider a career in radio, so why waste the tax payers money on a high school station. You're upset that NPR gets a pittance from tax dollars, but think every high school should have its own station cluttering up the air waves ? We'll just have to agree to disagree on that one.
NPR does fill an important need in radio today. If it weren't for NPR, I'd rarely listen to the radio, other than to hear some talk shows as the commercial radio stations stopped playing music I liked many years ago and am thankful for NPR's great jazz and Classical music, plus the great informational (All Things Considered , Morning Edition, Marketplace, etc, and entertainment shows like Car Talk, Prairie Home Companion, etc. Frankly, the tax dollars that the Fed gives to NPR and PBS, in my opinion, is some of the better spent tax dollars, and Lord knows the Fed knows how to waste Trillions of dollars. So, I guess we'll just have to agree to disagree.