I don't mean that the internet will create unbounded prosperity for authors or creators. We can see that its effect is in fact the opposite (large companies are only somewhat isolated from this by their massive legal war chests and latent political clout, derived from employing a significant portion of a representative's constituency).
I mean that culture prospers more by allowing people to create and publish whatever iteration, derivation, or alteration they want than by ensuring a small group of well-moneyed "idea owners" can utilize the force of the state to monopolize significant cultural icons and stop people from going "too far" in their cultural iterations (that is, too likely to win the favor of the public as compared to the "owner's" offering; being too desirable and competitive).
The viability of establishing a revenue stream from this cultural lather is separate from the value or existence of a fertile culture itself. Creation will always occur. Copyright is just a matter of how far those creations are allowed to grow and/or spread before they get crushed by someone else's bank account (which can have chilling effects on the back-end, preventing the incubation of certain ideas due to uncomfortable legal risk, but it won't stop the ideas from germinating).
Culture is in a bad state when disseminating the wrong ideas in the wrong medium can result in the complete forfeiture of all earthly freedoms. If you sell T-shirts bearing Mickey Mouse's image without the permission of the "owner" of that cultural icon, you may very well find yourself not only deprived of your possessions through a costly legal battle (which you have lost before you begin), but potentially also deprived of your liberty when you're jailed for criminal copyright infringement. All because our concern for an active "culture" somehow translates into preventing derivatives, iterations, or improvements, blocking normal feedback and optimization processes and hopelessly distorting the market.
Fanfic authors have been sued for getting too close to the "owner's" trademarks. It's an entirely unnatural state of affairs and it stifles our cultural maturity.
Personally, I would suggest that people stop expecting passive IP-based revenue streams to cover them, because I don't think there is a lot of money in that down the road (because the internet makes it impossible to practically enforce copyright). You'll have to create a need for an ongoing service, paid for in small units, to get people to part with their money. Software vendors like Adobe have already accepted this.