Once ordinary people gain the practical ability to make their own copies, it becomes something they actually want to do. The old bargain is no longer a good deal for individuals or society as a whole, because the price is now very real, and very high. Ann Cockerham also wrote a nice informational piece for the American Library Association. Both are worth reading for more perspective on this issue. There's an important difference between authors and publishers that the current intellectual property system ignores.
Authors still perform a valuable service by creating intellectual property.
Publishers perform an increasingly useless service, copying information that individuals who own computers connected by the Internet can copy on their own. Creating copies is what computers do, every time you run a program the computer copies it into memory, every time you view a song the computer copies it through the network so it can display it. Publishers have become useless middlemen rendered obsolete by digital technology. The laws of supply and demand are driving their profit margins to zero, and their efforts to fight back only highlight how little people actually need them. Notably, nearly 30 states are now suing the top record labels alleging CD price fixing.