He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper [candle] at mine, receives light without darkening me. That ideas should freely spread from one to another over the globe, for the moral and mutual instruction of man, and improvement of his condition, seems to have been peculiarly and benevolently designed by nature.... Inventions then cannot, in nature, be a subject of property. --Thomas Jefferson
That is about patents, not about copyright. Patents protect ideas/inventions, and are controversial. Copyright protects works, and aside from what should happen with it if the author dies, is not really controversial.
When the fruits of your labor are something that can be endlessly reproduced for nearly zero cost, I don’t think you have a very strong right to be paid.
There is no scarcity in digital media. Supply and demand will inevitably drive down the price to near zero.