My local pâtisserie doesn't charge 5$AUD for a whole range of pastry ~ https://flickr.com/photos/bootload/albums/72157622498559456
The high prices you quote come not from materials, display or worker pay, more probably property location and market they position themselves in.
It doesn't matter how skill or how rare the worker is, if you can't sell their work for a higher price.
there are dates on the various shots. Haven't noticed price increases since then. The shop is owned by French owners who grow the fruit/veg (sans exotic). Famous in my town.
(Actually, I'm constantly frustrated that baked goods, especially bread, in the United States aren't made fresh and sold in bulk. The good life was five fluffy pitas, still warm from the oven, for about $2, shelved alongside sweet croissants and savory burekas selling for roughly $4/lb. By comparison, basically everything in America is just crap, especially when I'm paying for the $35 artisanal free-range organic crap.)
I think that's the gist of the issue. People want a $5 snack, not a $35 artisanal free-range organic pastry dining experience.