We live in a society where everyone contributes something or the other. In order to have a balanced society and have peace and harmony we need to maintain discipline. Society brings unity and communal feeling which is for the welfare of everyone.
While we become part of society we do have individual responsibilities and we must adhere to this responsibility as the basic principle of humanity is not to harm other human beings.
Also, We need to contribute to nation-building as overall welfare depends upon everyone's contribution, and being a good citizen we need to contribute everywhere which includes tax, social responsibility, utility payment, etc. The Good Citizen is not only a good human being but also a very good leader who set an example for others.