William Graham Sumner explains the forgotten man on page 108.
the state cannot get a cent for any man without taking it from some other man, and this latter must be a man who has produced and saved it. This latter is the Forgotten Man.Today's tenured sociology professors would rather you not read this book: after all, they are part of theft via Pell Grants.
The friends of humanity start out with certain benevolent feelings toward "the poor," "the weak," "the laborers," and others of whom they make pets. They generalize these classes, and render them impersonal, and so constitute the classes into social pets. They turn to other classes and appeal to sympathy and generosity, and to all the other noble sentiments of the human heart. Action in the line proposed consists in a transfer of capital from the better off to the worse off. Capital, however, as we have seen, is the force by which civilization is maintained and carried on. The same piece of capital cannot be used in two ways. Every bit of capital, therefore, which is given to a shiftless and inefficient member of society, who makes no return for it, is diverted from a reproductive use; but if it was put to reproductive use, it would have to be granted in wages to an efficient and productive laborer. Hence the real sufferer by that kind of benevolence which consists in an expenditure of capital to protect the good-for-nothing is the industrious laborer.