[bumby]

I would argue there is a danger of conflating "productive value" with creative effort. The general view is that productive value is measured by how much a market is willing to pay for a product or service. I would venture to guess that most creative efforts aren't very marketable, unless your view is that society should go back to artisan craftsmen. Nobody particularly wants to consume the music that I create, so they have little to no procutive value, other than the joy I get from doing them. On the contrary, a lot of non-creative work has immense productive value. Re-shingling my roof isn't a particularly creative job, but I'm still willing to pay for it.