Hi-end hi-fi is all about creating a demand. This has to be done with advertising and marketing, which are very costly. That's where a lot of sales revenue disappears; the $25,000 or 50% of revenue in @mapman 's post.
Then you have all the overhead, employment on-costs, health & safety, taxes, compliance costs, legals etc etc.
As well as the R&D costs.
Truth is, it would be surprising if even 15% of revenues go into the hard components contained in the equipment being sold.
That's the fact of life on doing business in an advanced western economy. Everything is on-costs.
My dad (and he was an accountant) used to say 'why should I pay $5 for a bowl of soup in a restaurant when I can buy a can of soup for 30c?'. This, essentially, is the answer to mapman's dilemma.