Production choices in Hayek's theory of information-bearing prices
Having mulled over this for a while, I think the answer is actually quite simple. While luxury goods might have some of the highest margins and highest prices per unit, they don't actually make the producers the most money because of the low quantities in which they are sold. So I think my summary might have been ill formulated. Instead of “produce what is most expensive”, a better summary would be “produce what is most profitable”.

Clearly luxury goods are not what is most profitable. Currently this would rather be high-tech services such as data analysis and reliable forecasts.