Basically what the title says.
At the local grocery store, shortbread cookies are consistently the most expensive cookies out there. I just checked on-line and saw the same price for 4.5 oz packages of shortbread, as 7oz packages of other “premium” non-shortbread cookies.
In my ignorance, I would think the fewer ingredients would result in simpler processing - but maybe they require a greater amount of butter or some other pricey ingredient.
I suspect there is some Anglo shortbread mafia responsible for price-fixing…