Empire-building
In political science, empire-building refers to the tendency of countries and nations to acquire resources, land, and economic influence outside of their borders in order to expand their size, power, and wealth. This expansion can be at the cost of those nations or people that have had resources taken away from them so that the conqueror can be enriched.
In business, empire-building is demonstrated when individuals or small groups attempt to gain control over key projects and initiatives to maximize job security and promotability. Project leadership hoards potential credit and prestige the project can produce. Because this approach prevents other people in the organization from contributing in a meaningful manner and alternative or competing projects to address the project's goals are destroyed regardless of their merit, the company suffers as a whole, projects fail, and the goals of the project are achieved partially, inadequately, or not at all. This sort of behaviour is supposed to be stopped by upper management but is nevertheless very common.