Answer:
Entitlement and custom rather than on ethical behaviour.
Step-by-step explanation:
Employers have a moral duty to look out for the well being of employees. It is not a question only of fair pay and suitable working conditions, there should be a real and long lasting concern for the welfare of employees.
The importance of connecting pay to performance is a suitable topic when discussing ethics. A lot of companies do not link pay to ethical behavior but pay is based on entitlement and custom.