Even though everyone is replaceable, employers must understand that even though an employee may be replaceable, the quality and production level of their work might not be. Most employees don't ask for much in return for their loyalty to the company but a lot of employers fail to see that. Here is a brief article of 4 simple ways an employer can make their employees feel valued.
https://www.themuse.com/advice/4-simple-ways-to-make-your-employees-feel-valued