All power struggles are about one thing, control, simplified to the fact that people, organizations and governments only take action to carry out one of two things. They are either taking action to gain something or taking action to prevent the loss of something.
Economics is about distribution of limited resources and services to satisfy the unlimited needs and desires of the populations and politics is about the struggle to gain power to control the economics.
Everything that happens is because of this. Your boss has control over you because you want the pay and do not want the loss of a job. He wants the power of boss because then he has the political power to control your economic future.
This happens all the way up the ladder to a company or a country president. They want political power to control the economics so that they can have control of the limited resources/services.