While some authors make an exaggerated claim that it was a "state-planned economy" or even "socialist", the Inca economy was impressive. There was little to no commerce as such; the production of all the empire was administered and redistributed by the state. I have to look up the exact quotes now, but the Spanish were impressed that they saw no poor people among them, because they could simply go to the local tambos to take the food or clothing they needed; these tambos also served as administrative centers for the whole *bureaucracy* this needed. And it was so efficient that people in Cuzco, 3000 meters high in the Andes, could enjoy fresh seafood from the Pacific and items from the nearby jungles. There have been other "palace economies" where the central "palace" redistributed resources like say in Greece, the Middle East, but those were mostly city-states, not an empire that covered almost half of South America. It was something unique.