Naruto uses a currency called the ryō (両).
The ryō (両) is the currency used in the Naruto world. It is based on an old Japanese gold coin that was used in Japan before the Meiji period. It was later replaced by the yen. The exchange rate of a ryō is 10 yen
This means 1 ryo ~ 0.1 USD.
From what I can see the villagers pay money for all the missions completed. According to the wikia,
- The reward for a D-rank mission is between five thousand and fifty thousand ryō
- The reward for a C-rank mission is between thirty thousand and 100 thousand ryō.
- The reward for a B-rank mission is between 150 thousand and 200 thousand ryō.
- The reward for an A-rank mission is between one hundred fifty thousand and a million ryō
- The reward for an S-rank mission is more than a million ryō
From what I can observe, if you earn 5k ryō a day for 200 days a year (1 D-Rank mission per day), you have 1 million ryō viz. $100k per annum. Not bad for doing oddball jobs. This doesn't seem like a feasible economy to me.
However, since all this information is available in databooks etc., has Kishimoto ever suggested how this economy would function?
Or is this another case of WritersCannotDoMath?