It seems like the hardest part of providing these services is getting the content owners on board. I haven't seen much indication that Amazon is better at cracking that nut than anybody else.
Further, free/cheap alternatives reduce demand for premium services. Why would content creators cannibalize their own revenue streams?
I'll be on board with your view once we reach post-scarcity, but right now humans still need to eat, and high quality production still requires money to produce.
Every hour that a quality musician can afford not to work is an hour they can be working on refining their craft. It has already been shown that touring pays less than minimum wage (yes, including those fucking t-shirts) for all but the top acts, so the purchase of music is one of the few ways to stay afloat.
The truth is, if we support the musicians that make the music which we want to hear more, then we will get more of that music.
I'm an ardent supporter of Lessig et. al, but the proposed alternative revenue models aren't working.