It is customary to describe human economies as “mechanisms,” but “plumbing” would be more apt. The economy, as economists define it, really is just the realm of money; so those who get to design the pipes and valves can determine in large measure where that money flows.
Establish a Federal Reserve to guide the creation of money through commercial banks, for example, and the rest is pretty much details. Arrange the international plumbing so that struggling nations have to go to an International Monetary Fund for financial relief, and you can bring those nations to heel without a rifle being raised.