Music is all about personal tastes. Some people do not care if there is a message and have no problem listening to music that is "about giving your virginity to your boyfriend on Saturday night."
I do believe a good portion of the radio is garbage. I am also convinced that Payola is still in existence. The last revealed scandal being I believe ten years ago. I know a lot of people who simply listen to the radio and could care less about music, which dumbfounds me, but it's their opinion. If you are forced to listen to the same things repeatedly, after awhile they will either grow on you or you will hate them. A lot of people also want something they can "dance to." So they just need a beat no matter how horrific the singer/lyrics are.
While the Killers are not what they used to be, I would much rather listen to them than 99% of what is on basic radio.
Again, this is my opinion, because there are no facts in taste.
Also, they just call the music on the radio in America retarded, NOT America.