Sortof a side note: Would you be more interested in capturing an audience with sizable disposable income that spends wisely, or an audience with less[meager, even] disposable income that spends foolishly(that is, a fool and his money, so to speak).
Uh, caveat re question above; we're talking soap and like products for your target audience, right? Not yachts and summer homes.
If by that you mean, does commercial broadcast have more tendency to influence the great unwashed than the elite, you would have to supposte the former.
But I caution that it is not only the bottom of the economic ladder but also much of the top which goes for Democratic politics - the former is willing to be patronized as "poor," and the latter is willing to patronize "the poor." The Republican Party exists largely to protect the middle class from both the envious "poor" and the patronizing rich.
Either is a valid marketing approach. It just depends on what your product is. For ex., it would be foolish to try to sell Ferraris in the inner city. A coke dealer or two might buy one, but (crime aside) you wouldn't make it. On the other hand, it probably wouldn't be good to put a "Dollar Store" on Rodeo Drive, although, oddly, we have a "Goodwill" store in Centerville, OH, one of the richer suburbs of Dayton, and my wife knows MANY fairly well-to-do people who shop there. I'm sure Clark Howard would!
Soap, not yachts.
Listen my friend, today's media does what yesterday's media did.
Whatever "Mr. Jensen" wants.
Honest, it's really no more complicated than that.
...think about it. ;^)