The idea that all knowledge is attained through experience was referred to as by the greek philosopher aristotle.

Philosophical Empiricism

Explanation:

The philosophy of empiricism found its root in the Greek and Roman perception of word where Greek means it experience and for Romans its skills or practical experience. And Aristotle suggested that people understand this world through experience, observation, and evidence. All the knowledge acquired by people came through sensed and they rejected every other theory to perceive reality.

you would times this by how many days there are in a year 365*400=$146000

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.