I don't think anyone would want to pay for the art I can make. I don't want to pay for anyone else's either. Given how much music piracy there is, and the vast skill disparity between casual amateurs and dedicated professionals, and the near-zero cost of replicating the bits composed by someone better than me or any of my immediate peers, I can't believe the author thinks that trading bits is a possible outcome. Why would I want my dad to educate me when I could watch OpenCourseware? Why would I want my friend's painting when I could get something much better over deviantArt? Why would I bother getting recipes from my mom if I can get them from a 4 star Michelin chef instead?
You might not want your friend's art, but there's plenty of excellent art not on DeviantArt. Especially if you custom made: Kickstart and other escrow services can fund stuff that doesn't exist yet (and therefore can't be pirated).
Similar to what's done with TV shows (a pilot is made, then if there's interest by any network, they fund the rest of the season), but with artists directly proposing their 'pilots' (a first chapter of a book, a trailer of a movie, a single song) directly to the audience and letting them fund the rest.
So if you're willing to grant the point that not everyone is going to be capable of creating good art, then what do the non-producers do? Just sit back and consume? The problem is that we use productive output as a heuristic for determining how much stuff to give back to a given member of society. If the standard changes from "making widgets" to "making art," most people are still going to starve.
