Elves do not rely on money in the same way humans do. While money is exchanged for goods and services, it is not a driving force in their society and is not a factor when considering social classes or nobility. Elves are given a birth fund with more than enough money to support them comfortably through life. They can pay for things using a small green cube(Treasury Cube) that they scan, but it basically never runs out. They do not have to work like humans do; they choose to work because it is an interesting thing to do with their very long lives because, otherwise, they would basically do nothing their entire life. With their birth fund, elves are given 5 million lusters at birth, supporting them throughout their lifetime. According to Fitz, the worth of even 1 luster is as much as billions, possibly trillions if converted to Human currency.