Background This piece doesn't have a whole lot in terms of background. Mostly, it is how Wallace's informational claim of Mackey making quotes is really an interpretative claim. I have full intention to discuss quoting versus stealing at some point in my essay, perhaps as a pair of "key terms" paragraphs and a synthesis paragraph.
Theory/Technique Mackey uses what he refers to as a "damn bright ending" to finish a piece about the coming of the goddess of light. Mackey takes Holst's chord and adds a new layer of meaning to it. This is much like how an individual writing the persuasive essay would write it (perhaps not with the quote at the end but the general concept follows).
Exhibit I'm using this piece as an exhibition source. The piece of music that these program notes are in reference to does a phenomenal job of quoting and recontextualizing (indulge me if that isn't a word) music from other (relatively) famous musicians. The program notes even address these quotations and break it down on a much more musically inclined level (which, for this level of writing, I will likely disregard).
Argument They say that composers using others work is stealing. I say (with the appropriate rules and guidelines being followed, that is) that it is quotation.
Motive So what? Well, a lot of people know about U2. Furthermore, I'd be willing to bet that an immense amount more of people have heard of "Where the Streets Have No Name" than have heard of "First Suite in Eb". As this goes to show, this is a much more relevant topic than ripping off some old and dead Baroque composer (or should I say, de-composer?).