This booklet from the Federal Bank of Chicago (entity of the FED) -in English hélas- explains how the banking system (private) creates money from nothing. Thus, quite legally, without creating another mechanism doubtful, the issuance by the state of the good treasure of a particular amount, brings the Fed to create the same amount of currency -jusqu'ici, so good - but it traveling from bank to bank by loan facility / nested loans simply checking the guarantee of a legal reserve of 10% of the credit advanced by accumulation causes the creation of a money supply up to nine times the amount the initial base (fig. p. 11). Of course, all this money created out of nothing is subject to an interest that must be paid by the borrowers. This system ensures that by building the sum of the debts will never be repaid.