Banks exist because trust doesn’t scale

Some days, the financial news seems to have nothing whatsoever in common but yesterday there were four stories where I saw a link.

The first is a US senator demanding answers from Barclays over Jes Staley's relationship with Jeffrey Epstein. Then there are UK banks are facing political scrutiny for restricting customers from making crypto payments. Deutsche Bank's headquarters have been raided for the third time this year in a tax avoidance scandal. Meanwhile, a Wimbledon finalist says she lost her £31 million fortune because she trusted her ex-husband.

US senator wants urgent answers from Barclays over Jes Staley’s ties to Jeffrey Epstein | Barclays

UK banks increasingly restrict crypto payments, provoking cross-party inquiry

Deutsche Bank headquarters raided for third time this year

Wimbledon finalist loses her £31m fortune and blames ex-husband - 'I trusted him'

At first glance, these stories appear to have nothing in common. One concerns corporate governance, another consumer protection, another regulatory oversight and the last a deeply personal financial loss. Yet look beyond the headlines and they are all really asking exactly the same question: who should we trust, and who should carry the risk when that trust is misplaced?

For years, we've described banking as the business of money. Banks take deposits, make loans, process payments and move trillions of pounds around the global economy every day. Technology has transformed how all of this happens. Artificial intelligence is approving loans, algorithms are monitoring transactions, payments settle in seconds and digital identities increasingly replace handwritten signatures. From the outside, banking looks more like a technology business every year.

I think we've been describing banking incorrectly for years.

Banking has never really been about money. It has always been about judgement. Every financial decision ultimately comes down to two simple questions: can I trust you, and if I can, how much risk am I prepared to accept? Everything else is simply the mechanics of moving money. Whether we are talking about a mortgage, a payment, an investment, an insurance policy or a business loan, every financial product is simply a different way of balancing those two variables. Money is not the starting point. It is the outcome.

That is why today's headlines are far more connected than they first appear.

The questions surrounding Barclays are really questions about governance and judgement. Investors, regulators and customers all want confidence that the people running a bank can be trusted to make good decisions. The debate over crypto restrictions is really about deciding where the boundary lies between protecting customers from fraud and allowing them the freedom to take risks with their own money. The repeated investigations involving Deutsche Bank remind us how fragile institutional confidence can become, while the tennis player's story is simply one of the oldest financial lessons ever learned: long before cybercrime, cryptocurrencies or AI, people lost fortunes because they trusted the wrong person.

These are not isolated stories. They are all examples of finance trying to answer the same question: how do we create enough trust for economic activity to flourish whilst managing enough risk to prevent it from collapsing?

This also explains something we often forget about banks themselves.

Banks did not emerge simply because people needed somewhere safe to store money. They emerged because trust doesn't scale on its own. Economies need trusted intermediaries that can make trust scalable whilst managing risk.

This is why I often begin presentations with two Latin phrases that are over two thousand years old: Caveat Emptor (‘buyer beware’), and Uberrima Fides (‘utmost good faith’). They may be ancient, but they perfectly describe modern finance. Every transaction asks exactly the same question. If I'm buying from you, can I trust you? If I'm selling to you, can I trust you?

Every time two strangers want to do business, there is uncertainty. Would the buyer pay? Would the borrower repay? Would the merchant deliver? Would the insurer honour the claim?

Seen this way, banks don't create trust. They make trust scalable by managing risk. They allow millions of people who have never met to trade, invest and borrow with confidence because an intermediary has assessed, priced and distributed the risks on their behalf.

Left entirely to individuals, every transaction requires each side to judge the trustworthiness of the other and to estimate the risks involved. That is expensive, slow and often impossible. Banks and insurance companies were invented to solve this problem. They became professional intermediaries, sitting between savers and borrowers, buyers and sellers, investors and businesses. Their role was never simply to move money from one place to another. Their role was to absorb, assess, distribute and price risk whilst creating sufficient trust for commerce to happen.

That is the real reason financial institutions exist.

Of course, they do not always get the balance right. Restrict too many payments and customers accuse banks of becoming overprotective. Allow too much freedom and fraud flourishes. Lend too aggressively and losses mount. Lend too cautiously and economies stagnate. Every single day, banks are trying to find the point where trust is sufficient and risk is acceptable.

Artificial intelligence will not change that. If anything, it will make the balancing act even more important.

AI will become exceptionally good at detecting fraud, analysing behaviour, predicting defaults and identifying financial crime. It will almost certainly outperform humans in many of these areas. It can estimate risk far better than most of us ever could. What it cannot do is decide how much risk society should be willing to accept, who should carry that risk or where responsibility ultimately lies. Those remain human, regulatory and ethical decisions.

This is why I think we are asking the wrong question when we debate whether AI will replace banks.

The better question is whether AI will help banks become better intermediaries.

The future of banking is not really about AI, blockchain or even digital currencies. Those are technologies. The objective is much older than that. It is to build systems that allow people to trust more whilst taking less risk.

Perhaps that is the real story hidden inside today's headlines. They look like stories about governance, crypto, regulation and personal relationships, but they are all really stories about the same thing.

We often say banks are in the business of money.

I think that's too simplistic as it has never really been true.

Money is what banks move. Trust and risk are what they manage.

That was true more than two thousand years ago. It was true when the Medici built Europe's banking networks during the Renaissance. It is still true today and, in a world of AI agents, synthetic identities, deepfakes and machine-speed fraud, it may become more important than ever.

Banks exist because society needs trusted intermediaries to balance trust with risk. Get that balance right and money flows. Get it wrong and economies stop working..