Human life is just like a marathon race. Physical marathon race has a finishing line whereas intellectual marathon race will never end. The ultimate desire for human is to exercise the greatest possible control over the other human and things around him. With the control on human comes indirectly some control on things, such as politicians using their power to gain materialistic benefits. Likewise, with the control over things comes indirectly some control over human, such as rich people hiring other people to work for and serve them.
Politicians also have direct control over things, such as government-owned enterprises and assets.
Nevertheless, this kind of control is not absolute and politicians cannot blatantly take the things under control as their own assets. On the contrary, the assets of a capitalist are entirely privately owned and the capitalist has absolute control over them. The study of how people control one another in order to gain indirect control over things is called politics. The study of how people make use of the control over things to indirectly control other people is called economics. Only after man fs lower level of needs have been satisfied, will he recognize the need at the next higher level.