If you are graduated from some university working for someone, or you have a small business, or having a salary that fulfills your bills and rent and leaves a little for investing, I assume you are considered middle class.
In other way and more precisely, the middle class is a class of people in the middle of a social hierarchy. In socio-economic terms, the middle class is the broad group of people in contemporary society who fall socio-economically between the working class and upper class.
But why middle class is important for the health of economy and event social behavior of the country?
Perhaps the most important way a strong middle class boosts economic growth is by creating better governance. The middle class has a strong interest in promoting foresighted policies and making government work well because their economic fate is more closely tied to the quality of government than that of the wealthy.
Every person in a society almost needs things equally. I ride a car, bill gates rides a car too! He can own several cars, but can ride one! Rich people may consume more, but not more than many middle class people. The middle class keep the business run more steady and sustainable.
More taxes help middle-class
Tourism helps middle class
wealth distribution helps middle class
Small sized government helps middle class