"Moral precepts aren't economics"
Perhaps moral precepts aren't economics, but a connection with utilitarianism is often made in introductory textbooks on economics. For example:
"Economics is not about the financial fate of particular individuals or particular enterprises. It is about the material well-being of society as a whole. When economists analyze prices, wages, profits, or the international balance of trade, for example, it is from the standpoint of how decisions in various parts of the economy affect the allocation of scarce resources in a way that raises or lowers the material standard of living of the people as a whole."