The easy answer to this is to raise prices. We need to raise the price of digital goods if we want to move forward as a post-industrial society. I pay $36 a year for Pandora, I would pay $72. $3 a month is an insanely good deal. Before Napster I would easily spend $30 a month on music. Society needs more money in artists hands, because the robots are coming to take away more jobs, and we can offset some of that by reducing the labor supply by allowing more people to earn a living creating digital goods.
Many of you will say that most aren't good enough to be pro artists. I say that so many more would become good enough through deliberate practice if financial viability wasn't nigh impossible.
Capitalism as we know it will not survive zero-priced digital goods, robotics and other forms of automation. Deflation is a specter over all our heads.
Wise nations will look for ways to reduce the supply of labor, instead of an insane push for ever higher employment levels.