Ethics:

Ethics is the set of some moral values and principal that differentiate right and wrong morally.

Agency theory:

According to this theory, the management of the company is the agent of the shareholders (principal). They work in the company to maximize the profit of the principal. Principals expect that the agents work according to them because they are owners and they hire agents for work. According to this theory, the principal gives salaries and wages to agents and in exchange, they give them good performance.