What are we doing to the society?

Sometimes I used to wonder, whether I am doing anything for society or not.

Then, I realized that anyone who earns the same or more than what they consume is useful to society.

Many people are getting employment because you are alive and consuming. Even if you are living with basic necessities, you would be consuming food and other groceries, you might be travelling by bus or train etc. To provide those facilities to you, someone is getting employment (even if it is a fraction of their total employment).  

If you are a rich person who splurges money on many things, then there would be many people living on you. Without you, the total employment would reduce. 

Apart from that, I pay a lot of income tax. (It is not my problem, if people don't vote for good candidates for the efficient use of that money.)