The question of what's "value" in high-end, and what's "middle-class" is a complex dynamic in the global economy. As Bruce said, $75k doesn't leave much discretionary income in NY, SF, Seattle or even Singapore, Sydney, Hong Kong, or London.
I was looking at global salaries over the weekend and was quite shocked by what has happened. A Manager in the IT industry with 10 years's experience was commanding $250k in Singapore, $125k in Seattle, $180k in NYC and $325k in London. (These are "top" salaries commanded by head-hunters, so not typical but for this particular firm that sent me those numbers.)
It may be down to the relative cost of living "well" in those cities, but the low levels in Seattle and NYC was quite surprising compared to Singapore (where I came from) and London (where I studied). But then, rental properties in London and Singapore are 3 times more expensive than Seattle and Bellevue. In London, a large part of that salary will also go to taxes, which are far lower in Singapore.
On a global perspective, I have read elsewhere on this forum that manufacturers have been asked for more expensive products by their Asian distributors. I experienced the same, releasing value-oriented products for the US market, I was taken to task a couple of years ago by some European and Asian distributors that I shouldn't be diluting the Genesis brand by selling products that are too cheap. In the context of the price of cars and other luxury goods in Singapore, I don't think that $180,000 is too much to pay for an amplifier or loudspeaker. That's less than the price of a Honda Odyssey in Singapore.