Several reasons can be cited as to why the professional middle class is so influential. One is that journalists, commentators, writers, professors, economists, and political scientists, who are essential in shaping public opinion, are almost exclusively members of the professional middle class. Considering the overwhelming presence of professional middle-class persons in post secondary education, another essential instrument in regards to shaping public opinion, it should come as no surprise that the lifestyle exclusive to this quasi-elite has become indicative of the American mainstream itself. In addition to setting trends, the professional middle class also holds occupations which include managerial duties, meaning that middle-class professionals spend much of their work-life directing others and conceptualizing the workday for the average worker.