How Fiat Is Created

Most people assume that currency is printed by the government and distributed as wages or benefits. This is not how the modern fiat system works. Almost all new money in circulation is created by commercial banks, through the process of issuing loans. The central bank plays a supporting role by setting the price of reserves and by purchasing government bonds.

Commercial Bank Money Creation

When a bank issues a loan, it does not transfer money from some other depositor's account. It creates a new deposit in the borrower's account, marking the loan as an asset on its own balance sheet. The accounting entries are symmetric: a new liability (the deposit) and a new asset (the loan).

This process creates new money from nothing. It is limited only by the bank's capital ratios, regulatory rules, and the willingness of borrowers to take on debt. When the loan is eventually repaid, the money is destroyed — the deposit is cancelled against the loan. The system grows or shrinks depending on the net rate of new borrowing versus repayment.

Central Bank Operations

The central bank does not create most of the money in circulation. It creates reserves — a special kind of bank liability used only between banks. These reserves back the commercial banks' liabilities and are the ultimate settlement asset in the domestic payment system.

When the central bank wants to increase the money supply, it buys assets (typically government bonds) from commercial banks, crediting their reserve accounts. This gives the commercial banks more capacity to issue new loans — which is how the newly created reserves translate into new money in the wider economy.

This is what quantitative easing is, in technical terms. The central bank expands its balance sheet by buying assets, the commercial banks receive new reserves, and the resulting capacity for new lending eventually propagates into the prices of everything else. The lag between central bank action and consumer price response is typically twelve to eighteen months.

Why the Supply Is Unbounded

There is no hard upper limit on how much new money can be created. The central bank can buy any quantity of eligible assets. Commercial banks can issue any volume of loans subject to capital constraints, which are themselves set by regulation and can be changed.

This is the structural feature that distinguishes fiat from hard money. There is no external constraint on supply. Every other monetary good in history had some physical limit — gold had mining, silver had mining, stones had quarrying, shells had reef growth. Fiat has no such limit. The supply is governed by political and institutional decisions.

The Consequence

Over decades, the trend in every fiat system has been toward more aggressive expansion. This is not because central bankers are dishonest. It is because the incentives of the political system reward expansion: expansion finances deficits, lowers interest payments on existing debt, suppresses the cost of financing, and distributes benefits to the politically connected first recipients of new money (see the Cantillon effect).

Contraction, by contrast, is politically costly. Reducing the money supply means allowing malinvestments to liquidate, asset prices to fall, and debt burdens to become harder to service. No elected government has strong incentives to allow this to happen on its watch. The system therefore expands, always, in the long run.

This is the structural argument for hard money. Not that central bankers are bad actors, but that the institutions they operate cannot, by their nature, maintain purchasing power over time. Bitcoin removes the problem by removing the discretion.