Lack of economical education in the culture? Capitalism: Buy as cheap as possible, sell as expensive as possible. In the battle of this two intents, 'fair' mark

Lack of economical education in the culture? Capitalism: Buy as cheap as possible, sell as expensive as possible. In the battle of this two intents, 'fair' market price emerges. If business tells you otherwise, if it frowns upon chasing your market value (including job hopping), is it a big fraud?