According to this, the labels rammed thru a law that prohibits playing anything later than 1972 without paying copyright. If true, that accounts for hearing nothing but goldie oldies on the radio.
Which is why the CD business is going to pot. Used to be, air play drove record sales. The labels used to bribe DJ's to spin their singles. Payola it was called. Now that we have no airplay, we have no CD sales.
The entire music business would be better off going back to the old system, radio stations can play any thing over the air copy right free.
Sounds like the kinda idea a buncha suits would have.