There are several problems with the so called "fairness doctrine", easily illustrated.
I'll use the local talk radio station as an example. I haven't listened as much in the past year or so, the format may have changed.
It starts with 3 hours of LOCAL hosts, Gill and Valentine. Then 3 hours of Liddy, syndicated. Then 3 hours of Ramsey, local but syndicated to other stations. Finally 3 hours of Boortz. So that's 12 hours of prime time air time for talk radio. And when MOST of the audience that pays the bills does most of their listening.
The average listener, if allowed to listen at work, and working the day shift, listens during that period. Then has an hour or so for dinner, and 3 hours of prime time TV. So that's 16 hours, and then bed for 8.
The station, owned by an individual, partnership, or corporation still has 12 hours to fill, usually with Savage and others, that are not as popular. The 12 hours of prime time is where they make their profit. keeping them in business and paying their employees (not just on air employees).
Now comes the "fairness doctrine". To supposedly "balance" 3 hours of Liddy, the station is FORCED to follow Liddy with Franken (or the "left" talk show host of your choice). So for that 3 hours, the listening audience drops, and now the station can't sell prime time advertising, so they lose money. But wait, there's more. The Liddy fan who used to stay tuned for Ramsey tunes out. So Ramsey loses some audience. More money gone. Then Ramsey or Boortz (or Liddy) is bumped from live radio, and the bumped show loses even more. And ONE of the four shows is bumped off of prime time, and loses even more. So now the station loses even more. Finally, the listener gets cheated out of his choice, one of his shows is no longer live, and no longer on during his prime listening time.
So, the station loses money, the show hosts lose money, the advertisers lose money, and the listener loses one of his shows, or more. The only person who MAKES money AND gets what he wants is Franken (or the "left" talk show host of your choice).
Oh, and then to balance another conservative show, the station is eventually forced to add ANOTHER "left" hosted show that doesn't make money. Another 3 hours they lose money and audience, and another 3 hours the listener doesn't get to hear what he tunes in for.
THAT is the "fairness doctrine" in a nut shell. Who is going to PAY for the lost profits? Why, the tax payer, of course. There's only one winner. The "left", who not only gets their "message" out that no one really wants to hear (because if people WANTED to hear it, they'd tune in and make it profitable), but their "hosts" get paid when they can't get a job in radio otherwise (note that "Air America" went bankrupt almost immediately due to a lack of listeners, despite massive promotion).