If the money saved by the thrifty saver is loaned to a thriftless borrower, wealth is not increased, but merely changes hands. The prodigal mortgaging his wealth, spending the money, and living beyond his income, absorbs the savings of the other. One saves and adds to wealth, the other consumes it. There is no net increase of goods, but two individuals have shifted positions; each has gotten his reward of growing affluence or penury. The "normal" end, however, of savings and loans is productive. The borrower, in getting control of purchasing power, aims to put a new machine where it will be useful, to remove obstacles, and to make economic agents more effective. Along the border-land of industry the active and alert borrower seeks out opportunities to make new agents earn a rental, and having found the opening, turns to the money market for the means to profit by it. [Sidenote: Lower interest means higher capitalization] 4. _A fall in the rate of interest normally accompanies an increase in the mass, efficiency, and valuation of durable economic agents._ A lower rate of interest means a higher capitalization of all incomes. It is not that either can be called the cause of the other; rather both are aspects of the same thing, the interest rate merely registering the change in capitalization. If the rate of interest has been five per cent., an income of $100 has been capitalized at $2000. When the rate falls to four per cent. the income is recapitalized at $2500. All along the line of investment there is an increase in the value of the durable economic agents. [Sidenote: And more complex industrial processes] [Sidenote: It encourages the increase of fixed charges to reduce cost of operation]