Private Platforms, Public Ledgers, and the Privacy Trade-off

Once BigTech finance is understood as a network of dependencies, the institutional question becomes unavoidable: who should control the payment and ledger layer? This chapter compares three designs discussed in the source material—a private platform with substantial market power, a public payment ledger or central bank digital currency, and competing platforms that cooperate selectively. The comparison is not a search for one universal winner. It asks what each design does to enforcement, private rents, privacy, interoperability, resilience, innovation, and the capacity of authorities to supervise it.

A private platform can make payment control enforceable

The Bank for International Settlements begins with a problem that technology alone cannot solve. Digital records can improve screening and record a contract, but a borrower can still sell for cash or through an anonymous channel outside the ledger. If that side trade allows the borrower to default while continuing to participate in the economy, the ledger does not control repayment.

A BigTech platform has a distinctive way to address the problem because it can combine trading and payment. It may route transactions through an internal ledger, issue platform tokens, and make cash less useful inside a walled garden. If a borrower’s future sales pass through the platform, the platform can direct some of that revenue toward repayment. In the BIS framework, future sales then function as “digital collateral.” The platform is not holding a traditional pledged asset. It is controlling the venue through which a future cash flow becomes visible and transferable.

This arrangement also uses the platform’s information advantage. A BigTech group can observe trade, purchasing habits, website activity, social-media use, and payment behavior that a bank may not be able to assemble on its own. Machine learning can use those signals to predict default. The platform therefore joins two functions that are often separate in traditional finance: it gathers information about the borrower and controls the channel through which the borrower earns or spends.

The benefit is potential access to uncollateralized credit. A business with intangible assets or a thin credit history may receive funding because its future platform sales provide both a signal and a repayment route. But the mechanism depends on scale. The more trade a platform intermediates, the harder it is for a borrower to use cash or another channel to evade repayment. A small platform may have to subsidize users with negative markups to make its tokens attractive, yet those subsidies may not cover the cost of operating the ledger. A larger platform can charge a positive markup and still keep users inside the system.

That creates the first institutional tension. Market power strengthens enforcement and can make ledger provision commercially viable. The same power lets the platform charge markups, extract rents, and decide which users or intermediaries can participate. If the markup becomes too high, users have more reason to hold cash or choose another payment route, which weakens the enforcement that made the platform valuable. If competition removes too much of the platform’s revenue, the ledger may not be provided at all.

The result is not a claim that monopoly is inevitable. It is a model-based trade-off.