The author considers the interaction of three national macrosystems (economic, legal, and social) within a national public metasystem, justifying and solving the problem of their balancedness using the concept of Berge equilibrium. This equilibrium mathematically expresses the Golden Rule of ethics (GR), one of the most ancient, specific, and widespread moral generalizations that appear in Christianity, Islam, Judaism, Buddhism, and Confucianism. It instructs: "Do to others as you would like them to do to you." The author studies the influence of morality (in the sense of Kant's imperative or the GR) on strategic decision-making in the national public metasystem. The Nash equilibrium of the three macrosystems reflects the neoliberal economic doctrine widespread currently. An alternative moral-philosophical economic doctrine based on the GR is substantiated using systems theory and game theory.