So Why Do We Need a Growing Money Supply at All?

Here's where we are after Parts 1 and 2.

Price shocks in one category — oil, food, tariffs — don't cause broad inflation. They reshuffle spending. That was Part 1. What does cause broad inflation is the money supply growing faster than real output. Technology should make most things cheaper over time, but the 2% inflation target deliberately offsets those productivity gains, converting what would be falling prices into rising ones. That was Part 2.

Which leaves the question that Part 2 ended on: why? Why do central banks deliberately expand the money supply? Why target 2% inflation instead of 0%? Who decided this, and what were their reasons?

The honest answer has three layers. The first layer is the strongest case for the current system. The second is where that case breaks down. The third is a question the first two layers don't want you to ask.

The conventional case (and it's not wrong)

Central bankers are not stupid, and the 2% inflation target is not arbitrary whim. There are real arguments for it. If this article doesn't present them fairly, nothing that follows will be credible. So here they are, in their strongest form.

The deflation buffer. In 1933, the economist Irving Fisher described a mechanism he called debt-deflation. The idea is simple but devastating: when an economy carries a lot of debt and the price level falls, everything shrinks — salaries, home values, business revenue — but the debts don't. A $300,000 mortgage is still $300,000 even when your income and your home's value have dropped. Borrowers who could afford their payments before can't anymore. They default. Banks fail. The money supply contracts further. Prices fall further. The spiral feeds on itself.

Fisher believed this is what turned the 1929 stock crash into the Great Depression. Central bankers today are trained on that history. Fisher's spiral requires falling prices — inflation going negative. A 2% target means prices are rising by 2% per year, which gives the economy a cushion. Even if a recession slows things down, there's a two-percentage-point buffer before prices start actually falling and the spiral could begin. Think of it as insurance against the worst-case scenario.

The invisible pay cut. Workers resist actual pay cuts. Even when a business is struggling, reducing someone's paycheck from $60,000 to $55,000 creates outrage and turnover. But if the paycheck stays at $60,000 while inflation quietly erodes what it can buy? Most people don't even notice.

That's the mechanism. Nobody has to make the uncomfortable decision to cut your pay. Inflation does it automatically — your salary stays the same, but it buys a little less each year. Central bankers argue this makes the economy more flexible during downturns, because labor costs can adjust without the friction of visible cuts that provoke backlash.

Policy room. When a recession hits, the central bank's main tool is cutting interest rates. But there's a floor — you can't cut rates much below zero.

If the target inflation rate is 2%, the nominal interest rate normally sits a few points above that, giving the Fed room to cut when things go wrong. If the target were 0%, rates would already be near zero in normal times, with nowhere to go in a downturn.

These three arguments are the real reason the 2% target exists. They are not propaganda. A Federal Reserve economist would make them exactly this way, and they would be right about the mechanism in each case.

Where the case breaks down

The trouble isn't that these arguments are wrong. It's that they're incomplete — and the things they leave out change the picture considerably.

The deflation argument is circular. Fisher's debt-deflation mechanism is real. But it has a precondition: a large overhang of existing debt. If households, businesses, and governments don't owe much, falling prices are just falling prices — benign, even welcome.

So where does all the debt come from?

Largely from the same cheap-money environment that the inflation target creates. When a central bank guarantees rising prices, borrowing is systematically rewarded — you take on debt at one price level and repay it in cheaper dollars. Over decades, that incentive produces the highly leveraged economy that then requires the inflation target to keep running.

The policy that prevents debt-deflation is also the policy that creates the conditions for it. The fix is the cause. It's not a cycle — it's a ratchet.

The 2% number has no theoretical basis. The invisible-pay-cut and policy-room arguments justify some positive inflation rate. But they don't justify 2% specifically. The same logic works for 0.5%, or 1%, or 3%.

So where did 2% come from?

The answer is less impressive than you might hope. In 1988, Don Brash — the incoming governor of the Reserve Bank of New Zealand — appeared on a television interview while the Reserve Bank of New Zealand Act was being drafted. Pressed on what “price stability” should mean as a concrete number, Brash offered something to the effect of “well, 0 to 1 percent” — almost off the cuff.

The RBNZ adopted a target range of 0–2%. The upper bound became the focal point. Other central banks copied it: Canada in 1991, the UK in 1992, Sweden in 1993. The Federal Reserve didn't formally adopt 2% until 2012, but had been operating as if 2% were the target for years before that.

Nearly every central bank in the developed world now targets the same number. That number originated in a casual remark on New Zealand television. There is no academic paper that derives 2% as optimal. The justification came after the decision, not before.

Policy room is self-justifying. Central banks need room to cut rates because they manage a system that periodically requires rate cuts. But a different system — one that didn't produce credit booms and busts through easy-money cycles — might not need the same kind of intervention.

Arguing that we need 2% inflation so the central bank has room to respond to crises caused partly by 2% inflation is not the airtight case it first appears to be.

The honest summary. The conventional arguments make a real case for some small positive inflation rate in a debt-heavy economy. But they don't prove the world needs continuous monetary expansion. And they don't justify 2% specifically. What they actually show is that monetary expansion is a policy response to conditions that monetary expansion helped create.

The question underneath

If we deliberately expand the money supply every year, the new money has to enter the economy somewhere. And it doesn't enter uniformly. It doesn't rain down on every household equally, like a dividend from the central bank to every citizen.

New money enters through specific channels. The Federal Reserve buys Treasury bonds from a small group of large banks (primary dealers). Those banks receive new reserves, which they use to buy other assets — stocks, bonds, real estate. The new money flows into financial markets first, pushing asset prices up. Eventually, some of it trickles into the broader economy through wages, hiring, and lending. But by the time wage earners and savers see any benefit, prices have already adjusted upward.

This mechanism has a name. It's called the Cantillon effect, after the 18th-century economist Richard Cantillon, who observed that new money benefits the people who receive it first and disadvantages the people who receive it last.

The pattern is visible in the data. Between 2009 and 2024, the S&P 500 increased roughly sixfold. Residential real estate prices in many major markets doubled or tripled. Meanwhile, real wages — wages adjusted for inflation — grew slowly. The people who owned financial assets before 2009 became dramatically wealthier. The people who didn't fell behind in relative terms, even when their nominal wages rose.

The Federal Reserve's own research acknowledges this dynamic. Multiple Federal Reserve staff papers on monetary policy and wealth inequality have found that accommodative monetary policy disproportionately benefits holders of financial assets. The distributional effect is not disputed as a matter of economics. The debate is over whether it's a tolerable side effect or a structural problem.

Here's what's not debatable: when the money supply is expanded, the new money goes somewhere first. The people closest to that injection point benefit before prices adjust. The people farthest away — wage earners, savers, retirees on fixed incomes — experience only the higher prices, without the offsetting gains.

That is a wealth transfer. It is structural, not accidental. And it operates every year, compounding over decades.

What the clock measures

The slow upward drift of prices you see on Satoshi's Clock — coffee, eggs, rent, gasoline, all of them creeping higher year after year — is not a malfunction. It is the successful execution of inflation-targeting policy, working exactly as designed.

Every dollar that buys a little less coffee this year than last year has been diluted by new dollars that entered the economy through the financial system. The barista doesn't see those new dollars. The landlord does — because the landlord owns an asset, and asset prices respond to monetary expansion first.

Bitcoin was designed as an answer to a specific question: what if we just didn't do this? A fixed supply of 21 million units. No central bank. No money printer. No Cantillon insiders. Every satoshi mined through the same process, available to anyone. The rules enforced by math and a global network of computers, not by the discretion of a committee that meets eight times a year.

Whether that answer works — whether a fixed-supply digital asset can function as money for a global economy — is genuinely uncertain. The Austrian economists who inspired Bitcoin's design believe it can. Mainstream economists believe the risks are too high to test. In a sense, Bitcoin is the test. It's running right now, in real time, with real money.

The clock isn't predicting Bitcoin's success. It's measuring the rate at which the current system erodes purchasing power — and showing what the timeline looks like if the alternative system continues to grow.

The takeaway

The 2% inflation target is a policy choice, not a law of physics. It was picked casually and spread by imitation. The conventional arguments for it are real but circular — they justify monetary expansion in a system that monetary expansion made fragile. And the expansion itself is not neutral: new money enters through the financial system first, benefiting asset holders before wage earners, compounding into a structural wealth transfer that operates silently, year after year.

The clock isn't measuring a malfunction. It's measuring a policy choice — and who ends up paying for it.