Is it possible to make too much profit?

Answer the question throughly below, give reasons why your answer is the way it is, etc. site your sources as needed. 

Question:

Some people argue that oil companies have made too much profit over the last five years. Is it possible to make too much profit? Why or why not? Assuming you are required as a congressional committee staff member to determine whether the oil companies have made too much profit, how would you go about determining to criteria to decide what is too much?