Since the days of Radio Shack and Tech Hifi (I worked for both), accessories like wires have always been the big mark-up, big profit makers for electronics stores. The only thing new is how expensive some are new and how much associated profit. It's hard to make money selling electronics alone. Speakers have also typically enjoyed high retail profit margins than electronics but wires have always been pretty much pure profit.
Thing is nobody needs to buy wires without the components they connect. Future fi all-in-1 products like KEF ls60 speakers mostly do away with the need for any separate wires or accessories which is a benefit for buyers but not so much for sellers.