I have done both military and aerospace, for NASA, design development and manufacturing of limited & small batch run electronics and can assure you that the retail cost of high-end products is not inline with their development and production costs.
I think I agree with that much. I'm not a manufacturer or developer of audio products however I can imagine there are many other expenditures involved with running an audio business that are outside development and production costs. Those need to be covered somehow, don't they? Just speculating: inventory overhead, warranty repair, customer support, advertising, shipping, audio show expenses, profit to get kids teeth fixed, etc. Others actually doing this will know better.
Granted that doesn't speak to "greed and corruption." But I think that is a different issue than contained in the above. Making products for money is not greedy or corrupt. [Gawd help