Inasmuch as risk is the cause affecting the rate of interest, it would be much simpler to consider the whole reward for abstinence as interest, the rate of which is affected by the risk; and to carefully exclude from the profits of capital the payment for “assiduity and skill,” which is distinctly wages of labor. The “wages of superintendence,” as every one on a moment’s reflection must admit, have no necessary connection whatever with the possession of capital. The thing with which the laborer is occupied does not give the reason for associating his wages with the name of that thing; because a highly-qualified manager supervises the operations of capital, it does not follow that he has capital, or should be regarded as being paid for the possession of capital. The man who shovels ashes is not paid wages of ashes, any more than a man who superintends other people’s capital is paid the reward of capital. The payment for services, in the one case as in the other, depends upon the skill of the manager, just as it does with an ordinary mechanic, rising or falling with his fitness for the peculiar work. Skill as a manager is the cause; the amount of the remuneration is the consequence. If so, then the wages of superintendence have no logical connection, in the economic sense, with capital as the thing which determines the amount of its reward, any more than it affects the wages of any and all labor. The payment for the use of capital, simply as capital, may be seen by the amount which a widow who is not engaged in active business receives from her property invested as trust funds. Moreover, it is less and less true that the manager of the operations of industry is necessarily the capitalist. To see this, mark the executive managers (called “treasurers” by custom) of cotton and woolen mills, who receive a remuneration entirely distinct from any capital they may have invested in the shares of the corporation; and the officials of the great mutual insurance companies, who receive the wages of managers, but for managing the capital of others. A large—by far the largest—part of what is usually called profit, therefore, should be treated as wages, and the forces which govern its amount are the same as those affecting the amounts of all other kinds of wages, such as are discussed in the preceding chapter. The acknowledgment of this distinction is of extreme importance, and affects, in a profound way, the whole question of distribution. To include “wages of superintendence” in profits of capital is to unnecessarily complicate one of the most serious economic questions—namely, the relations of capital and labor. § 2. The Minimum of Profits; what produces Variations in the Amount of Profits.