The whole "branding" thing started when Disney went to buy ABC.
At the time, questions were raised if a company which produced media, should be able to buy a company which distributed it. The line wasn't so invisible at the time because restrictions were placed upon many companies in media, such as movie production companies being restricted to own only so many of its own theaters.
During the Reagan Bush days, however, what was good for Wall Street was SUPPOSED to be good for Main Street, so the meme of the day was turned around that Disney wasn't a movie company, it was an ENTERTAINMENT company, and for it to own ABC or whatever was logical. The more or less threw the floodgates open.
The logo/trademark itself grew in value. This was for two reasons. First off, unlike patents or even copyrights, whose lives have been extended to ALMOST forever, the lives of trademarks ARE forever, as long as a given entity owns it and is willing to protect it.
The whole culture of "branding" evolved, allowing corporate gobble-dee-goop consultants weave this whole mythos about the value of the brand (at least to consumers).
It's implied that customers will recognize the logo/trademark as having value and gravitate toward that item. This is true (I like LG electronics, for example, but it cuts both ways (I no longer would consider buying RCA, Olympus or Phillips, after repeated bad experiences).
The upshot was that instead of Starbucks selling everything related to coffee, which would be logical, tangential offshoots like the one Ms. Klein refers to the in OP happen.
But the *REAL* benefit of trademarks was detailed by David Cay Johnson:
http://bit.ly/7DZBvq :
So now we get DIAPERS with Disney characters on them, even though the logos have NOTHING to do the final buying decision. While Klein comments on how their use affects our culture, the fact is that they do it to shift taxes onto US.