The following video demonstrates that some animals can perceive

 The following video demonstrates that some animals can perceive fairness. Watch a clip of the video beginning at 12 minutes and 30 seconds: 
de Waal, F. (2012, April 10). Moral behavior in animals | Frans de Waal [Video file]. Retrieved from https://youtu.be/GcJxRqTs5nk
To view the transcript of this video, click here. 
After watching the video, answer the following question: Is perceived unfair pay ratio a personal issue for humans as well? Explain your response, and provide an example.