"The middle class makes up most of the population. Defined as a household that earns a yearly income that hits above the poverty line but falls shy of the upper class, people in the middle class come from all walks of life, hold various types of jobs, and lead vastly different lives. One aspect does tie them together: they work hard to live well, and without realizing it, may be on the path toward becoming a millionaire. In this day and age, millionaires...