The issue isn't whether or not older people spend more money. That's NEVER been the issue in the hundreds of times this has been brought up. The issue is WHAT do they spend it on, and how do the advertisers choose to reach them.
You can see what they buy by watching cable TV channels aiming at that demo. They buy various drugs and medical devices, insurance, bathroom and kitchen remodels, financial planning, and other major expenses. The advertisers of those products need more time to sell those products than typical :30 spots. That's why when they buy radio, they use infomercials. They also feel they need the visual of TV to sell their products. As one marketing exec said to me, ''They can't buy it if they can't see it.'' Customers in that demographic are a much harder sell. They've heard it all before, and they know what they want. They don't want to be SOLD something. The whole process of selling products is harder when dealing with this demographic.
So it takes more time, and more time costs more money. Radio isn't seen as the most efficient way to sell. They prefer TV, print, and direct sales. The environment for the advertising also is important. When advertisers want to reach this demo, they prefer talk programming. That way they can explain their products better, and do it with the detail required. The drugs usually have long legal disclaimers that would take up all of the selling time of a traditional radio spot. So once again, they prefer infomercials, or appearing as a guest on the talk show, so they aren't limited by selling time.
Radio people know and understand all this. We've heard all of the concerns from the advertisers. This is why you hear infomercials, this is why you hear Buddy Shula hosting these infomercials on his station, because that's what it takes to close those sales for his stations. He has to give them more than traditional :30 spots. It helps that he has access to selling TV spots as well. It helps that he owns his own advertising agency that places those spots. Not everyone wants to go through all the crap Buddy goes through to make a sale. Even then, it's not for as much money as it would be if he was trying to reach women in their 30s. So that's why you hear more radio aiming for that demo than for people over 55.