Tax deletes deposits, but it’s what creates them that deserves the headlines
It may surprise many that public spending is not funded by tax, nor by borrowing. Tax, and what we call ‘government debt’, serve very different functions in a modern economy than suggested by Parliamentary debate.
I’ve written before that banks don’t lend out depositors’ savings. A banking license permits a commercial bank to create money. When you take out a £200,000 mortgage, the bank credits your deposit account with £200,000 of newly minted money, entering your loan contract as an asset on their balance sheet. The bank taps a keyboard, rather than a pool of savers.
In a currency-issuing country, government spending follows the same principle. When government pays FM Conway £1m for street works, £1m of newly minted money is credited to Conway’s bank account with, say, HSBC, while the Treasury’s overdraft with the Bank of England is increased by £1m. The total stock of sterling deposits increases by £1m. The government’s payment is backed neither by tax revenues, nor loans from bond sales, but by IOUs with the central bank.
So what is tax? While mortgage repayments destroy newly created money from bank lending, taxation destroys excess deposits, whatever their origin: whether government spending, or bank lending. Fiscal and monetary policy work together to keep the stock of sterling deposits in equilibrium with the goods and services available to transact — and to prevent excess deposits destabilising asset markets.
But if government can simply spend money into existence, why does it borrow? Here’s where the term ‘debt’ has exhausted its useful purpose. Governments do not issue bonds to borrow the currency they themselves create. They issue them because the private sector demands them, as the most trusted asset in the economy. What we call ‘total government debt’ would be better understood by the public were it called the ‘private sector’s safest asset account’.
With monetary sovereignty — full control over a widely trusted currency — modern finance has evolved beyond recognition, while maintaining the metaphors inherited from the gold-standard era, or even earlier. Metaphors for economic realities long since abandoned. The real hinge for modern economies with free-floating currencies is not funding government — it’s controlling inflation.
The wrong metaphors encourage the wrong debates. Perceiving the public finances as analogous to household finances, public discourse clusters exclusively around the question of funding. But taxation is only mopping up excess deposits from the economy; what really impacts the way an economy works for its participants is upstream — in the realm of what created those deposits in the first place.
We’ve had bank lending for property purchases driving asset price inflation; we’ve had money creation in high finance for speculation, creating excess deposits; we’ve had government spending on entitlements driving consumer price inflation (at new levels, during and since Covid).
More impactful than sophomoric cries to ‘tax the rich’, would be a clearer public demand for money creation for purposes that expand our productive capacity, build useful infrastructure, and support human capability — rather than to bid up existing assets or to fuel speculative cycles.
