1 defense: to make sure all the civilian's and pedestrians are safe from attackers ( all government have a sort of defense aka air force, navy, marines, etc.
2 national identity: every state is unique in its own way just like a person there are no 2 alike there is just one there cant be 2 flags nor 2 pledges every state needs to protect its own identity
3 representation: a government represents the intrest of its own nation like by going into trading agreements with other nations making treaties etc.
4 infrastructure: needs to supply the nation, good drinking water, eletricity, roads, bridges, etc.
5 social welfare: to protect the minors of the state from stuff they shouldnt see go to school learn get a education etc.
I would go into a reveloution if the government wasnt fulfilling the needs it needed to do because the economy would go bad diseases would kill people and nothing would be safe because the crime rate would go up because of loss of jobs and to much fighting