The Theory of Money and Credit - Ludwig von Mises [145]
When we see that the quantity of the commodity bills presented for discount increases at certain times and decreases again at other times, we must not conclude that these fluctuations are to be explained by variations in the demands for money of individuals. The only admissible conclusion is that under the conditions made by the banks at the time there is no greater number of people seeking credit. If the banks-of-issue bring the rate of interest they charge in their creditor transactions near to the natural rate of interest, then the demands upon them decrease; if they reduce their rate of interest so that it falls lower than the natural rate of interest, then these demands increase. The cause of fluctuations in the demand for the credit of the banks-of-issue is to be sought nowhere else than in the credit policy they follow.
By virtue of the power at their disposal of granting bank credit through the issue of fiduciary media the banks are able to increase indefinitely the total quantity of money and money substitutes in circulation. By issuing fiduciary media, they can increase the stock of money in the broader sense in such a way that an increase in the demand for money which otherwise would lead to an increase in the objective value of money would have its effects on the determination of the value of money nullified. They can, by limiting the granting of loans, so reduce the quantity of money in the broader sense in circulation as to avoid a diminution of the objective exchange value of money which would otherwise occur for some reason or other In certain circumstances, as has been said, this may occur. But in all the mechanism of the granting of bank credit and in the whole manner in which fiduciary media are created and return again to the place whence they were issued, there is nothing which must necessarily lead to such a result. It may quite as well happen, for instance, that the banks increase the issue of fiduciary media at the very moment when a reduction in the demand for money in the broader sense or an increase in the stock of money in the narrower sense is leading to a reduction of the objective exchange value of money; and their intervention will strengthen the existing tendency to a variation in the value of money. The circulation of fiduciary media is in fact not elastic in the sense that it automatically accommodates the demand for money to the stock of money without influencing the objective exchange value of money, as is erroneously asserted. It is only elastic in the sense that it allows of any sort of extension