And if income inequality increase, there will be less consumers able to consume that increased supply, further lowering the value of the supply of music. The "winners" of the situation who end up with more income do not have additional time to consume ever more greater quantities of music, while the losers have less money and potentially also less time (if they need to work more to make ends meet).

Edit: Also, given your wording of the question it seems like you aren't a producer of creative content yourself, so perhaps you aren't as directly aware of the trend I'm describing above, which has already had a serious effect upon an already difficult-to-pursue profession.