

well the understanding of the world was, that everything has a soul like attribute. and they are in a hirachy from close to god to far from god. so gold was inherantly a very close to god metal and therefore inherantly more worth than lead which was somewhat far from good.
So based on that world view of fixed values based on the christian god, they had no reason to belive the economy might suffer.
it kinda is. but its a reference to the modern reboot of she-ra where: (huge spoilers for the show, dont click if you plan on watching)
Tap for spoiler
adora/she-ra literally dates catra who is an antromorph cat