I doubt my microeconomics prof. (Kyle) reads this blog so I am gonna go ahead and quote a section of an email he just sent out (which also just made my evening):

For fun for those of you still reading, you can find a lyrical justification of monotonicity in consumer choice in the song Society by Jerry Hannan.  This was covered by Eddie Vedder of Pearl Jam for the film Into the Wild.  The free version can be listened to here jerryhannan.com.  The justification is contained in this stanza:

“There’s those thinking,  more or less, less is more
But if less is more, how you keepin’ score
Means for every point you make your level drops
Kinda like you’re starting from the top
You can’t do that.”

QED.  There you go.  An indie folk proof for rational preferences.

Here’s Jerry Hannan’s “Society” on youtube:

[youtube.com/watch?v=LqmwiA9rqMs]