In this movie in particular, Miranda is the picture of hard work causing arrogance in success. Her character, in my opinion, reveals that there is in fact a distinct hierarchy in the work field, specifically the fashion industry. Miranda is introduced in the movie as a cold hearted
Furthermore, in the work field hierarchy Miranda is top dog; because she is the editor of Runway, what she says goes and all those who work for her must worship her and succumb to her every wish. This reveals to the viewers that those in the highest power at their jobs have the ability to do whatever they wish. On a broader spectrum, it pushes those apart of the public sphere to want to be successful and be top dog in their line of work so they have the ability to do as they wish. Although some, may not abuse their power, as I would say Miranda did, many will find comfort in knowing that they have the greatest deal of power.
In sum, the movie The Devil Wears Prada, specifically through character Miranda Priestly suggests that audience members are shown that they must participate in the public by becoming successful in their line of work in order to maintain power.