State Theory helps us solve one of the mysteries of the fiscal policy of early kingdoms: Why did they make subjects pay taxes at all?
If Adam Smith were right, and gold and silver naturally became money because free markets wanted them, then why wouldn’t the king just grab control of the gold and silver mines and become powerful that way?
Lots of early kings DID do that. But then what was the point of extracting the gold, stamping a picture on it, circulating it, and then demanding that people give it back again?
But if money and markets DON’T emerge naturally, it makes sense. That’s how you create a market.
If you want to support a standing army of 50,000 men, feeding them is really hard. But if you just give them coins and then demand that everyone in the whole kingdom pay you some of those coins, you turn your whole economy into a big machine to feed soldiers, because now everyone in the kingdom has to find a way to help feed soldiers so they can get the coins they need to pay you.