The Theory of Money and Credit - Ludwig von Mises [156]
It is possible to estimate on empirical grounds that the relative demand for money in a country, that is, the extent and intensity of its demand for money in relation to the extent and intensity of the demand for money in other countries (this phrase being interpreted throughout in the broader sense), will not decrease within a relatively short period to such an extent as to cause the quantity of money and fiduciary media together in circulation to sink below such and such a fraction of its present amount. Of course, such estimates are necessarily based upon more or less arbitrary combinations of factors and it is obviously never out of the question that they will be subsequently upset by unforeseen events. But if the amount is estimated very conservatively, and if due account is also taken of the fact that the state of international trade may necessitate transfers of money from country to country if only temporarily, then, so long as the quantity of fiduciary media circulating within the country is not increased beyond the estimated amount and no money certificates are issued either, the accumulation of a redemption fund might prove altogether unnecessary. For so long as the issue of fiduciary media does not exceed this limit, and assuming of course the correctness of the estimate on which it is based, there can arise no demand for redemption of the fiduciary media. If, for example, the quantity of the banknotes, treasury notes, token coins, and deposits at present in circulation in Germany were reduced by the sum deposited as cover for it in the vaults of the banks, the money and credit system would not be changed in any way. Germany's power to transact business through the medium of money with foreign countries would not be affected. [7] It is only the notes, deposits, and so forth, that are not covered by money that have the character of fiduciary media; it is these only and not those covered by money that have the effects on the determination of prices which it is the task of this part of our book to describe.
If the amount of fiduciary media in circulation were kept at a level below the limit set by the presumable maximum requirements of foreign trade, then it would be possible to do without a redemption reserve altogether, if it were not for a further circumstance that enters into the question. This circumstance is the following: if persons who needed a sum of money for foreign payments and were obliged to obtain it by the exchange of money substitutes could do this only through numerous money-changing transactions, perhaps involving an expenditure of time and trouble so that the procedure cost them something, this would militate against the complete equivalence of money substitutes and money, causing the former to circulate at a discount. Hence, if only on this account, a redemption fund of a certain amount would have to be maintained, even though the quantity of money actually in circulation was enough for trade with foreign countries. It follows from this that the fully backed note and the fully covered deposit, originally necessary in order to accustom the public to the use of these forms of money substitute, have still to be retained nowadays along with the superficially similar but essentially different fiduciary medium. A note or deposit currency with no money backing at all, that is, one which consists entirely of fiduciary media, still remains a practical impossibility.
If we look at the redemption funds of the self-sufficing banks,