Wage Differentials Using the economic concepts that explain differences in wages, discuss any three of the following points. Post your response to each of the three points separately. Why does a chief executive earn more than a rocket scientist working for NASA? Why does a teacher earn less than a firefighter? Why does a union electrician earn less than a non-union electrician? Why does a white male earn more than a white female with the same level of education? Why does a movie actress like Angelina Jolie earn more than a movie actress from the 1940s?