We talk a lot about our addiction to social media. We talk far less about our addiction to digital payments — yet the two quietly share the same architecture and the same costs. Both remove friction from a behaviour we find rewarding, both run on instant feedback loops, and both degrade the cognitive and financial self-control that, until recently, helped people navigate daily life. Seen side by side, the parallels are uncomfortable.
Social media is engineered to capture attention. Notifications, infinite scroll and algorithm-driven feeds pull users back again and again, fragmenting concentration and overstimulating the brain. The evidence is now substantial. Neuroimaging work suggests that habitual reliance on digital platforms may alter functional connectivity in memory-relevant regions, and studies of young adults link problematic social-media use to measurable deficits in selective attention and inhibitory control. Higher fear-of-missing-out (FoMO) predicts excessive use, which in turn predicts everyday cognitive failures — distraction and reduced attention to ordinary tasks.
The mental-health toll runs in parallel. Research indicates that heavier social-media use at age 10 is associated with declines in well-being into early and mid-adolescence, particularly for girls. Among university students, excessive use is tied to low self-esteem, communication problems with family, and falling academic performance; the fleeting relief the platforms provide soon dissipates, leaving exhaustion and burnout. The reward loop is addictive precisely because it is frictionless: a swipe costs nothing, so we swipe until our attention is spent.
Digital payments work the same way on our wallets. Removing the physical act of handing over cashMoney in physical form such as banknotes and coins. More — the so-called “pain to pay” — makes spending harder to perceive and easier to justify. Survey evidence confirms what behavioural economists long suspected: people spend noticeably more when paying digitally than when paying with cash. Everyday purchases become moments where restraint weakens quietly, long before any monthly statement reveals the damage.
That weak restraint does not produce better consumption — it produces more of it, and often worse of it. Frictionless one-click checkout, instant credit and “buy now, pay later” smooth the path to impulsive buys: junk food, fast-fashion hauls that end up in landfill, gadgets that are unboxed and forgotten as evidenced by a 2010 paperSee Banknote paper. More How Credit Card Payments Increase Unhealthy Food Purchases: Visceral Regulation of Vices. The same instant gratification that makes the feed irresistible makes the unnecessary purchase frictionless. The choice architecture is identical: remove every pause, every cue to stop, and people go further than they would otherwise choose to.
Nowhere is this clearer than where mobile moneyFrom the Latin word moneta, nickname that was given by Romans to the goddess Juno because there was a minting workshop next to her temple. Money is any item that is generally accepted as payment for goods and services and repayment of debts, such as taxes, in a particular region, country or socio-economic context. Its onset dates back to the origins of humanity and its physical representation has taken on very varied forms until the appearance of metal coins. The banknote, a typical representati... More meets online gambling. Kenya’s M-Pesa is celebrated for improving finnacial inclusion, but its frictionless design also supercharged a betting epidemic. Within a few years of its 2007 launch, roughly 70% of Kenyan adults had adopted M-Pesa; by 2018, online betting in Kenya was pulling in around $2 billion a year — a hundredfold increase in five years — with some 96% of gamblers placing bets by mobile phone. The MIT Technology Review reported that 84% of Kenyan youth polled had tried betting and a third of those bet at least daily. One year, Kenyans sank Sh169.1 billion into bets routed through M-Pesa across more than 732 million transactions. As researchers put it, mobile money can be seamlessly integrated with gambling platforms, allowing for frictionless deposits and withdrawals — and young, lower-income male users show a higher propensity to gamble.
Brazil’s Pix tells a similar story at greater speed. Launched by the Central Bank in 2020, Pix settles transactions in under ten seconds and is now used by some 99% of Brazil’s online betting market, processing tens of billions of transactions a year. In 2024 the Central Bank president, Roberto Campos Neto, reported that betting transfers via Pix had jumped more than 200% since January alone. The most alarming signal: gambling was rising sharply among recipients of the country’s social-assistance programme — meaning instant payments were helping the most financially vulnerable bet away the money meant to keep them afloat. The government has since moved to limit online gambling.
Both addictions, social and financial, share a single root cause: the elimination of friction. And in both cases, what friction used to protect was self-control — the capacity to pause, notice, and decide differently.
For payments, cash was that pause. Handing over notes creates a vivid, embodied sense of loss — the “pain of paying” — that a tap on a phone simply does not. Crucially, that pain matters most exactly when money is scarce. Researchers studying cash versus debit cards note that the value consumers attach to insight into their budget, and the perceived usefulness of cash for that purpose, has gained importance since the start of recent crises — among people with weaker financial self-control especially. Cash, in other words, functions as a crisis-era budgeting tool: a finite envelope you can see emptying. When salaries shrink, prices spike and uncertainty rises, the physical visibility of cash helps people ration. Digital balances, by contrast, are abstract and endlessly refillable, and the frictionless rails that refill them — a tap, a Pix, an M-Pesa — are the same rails that drain them into bets and impulse buys.
This is the deeper symmetry. Social media strips the friction from attention; digital payments strip the friction from spending. Both then exploit the resulting self-control gap. The social feed depletes focus and erodes well-being; the frictionless wallet depletes savings and steers consumption toward junk — junk food, fast fashion, junk odds. The platforms profit from the gap, and increasingly so do the gamblers, lenders and retailers riding the same instant-payment rails.
The lesson is not that digital payments or social media are bad. M-Pesa and Pix have done genuine good, bringing millions into the formal economy, and online connection has real value. The lesson is that friction is a feature, not a bug. The pause that cash forces, like the pause that a closed phone invites, is precisely what gives self-control room to operate. Removing it in the name of convenience — whether for scrolling or for spending — leaves people, and especially the most vulnerable, exposed to their own impulses.
Rebuilding that pause does not require abandoning digital tools. It means designing them with restraint in mind: spending limits and cooling-off periods on payments, friction by default on betting platforms, the same kind of friction that responsible-gambling frameworks demand but instant-payment systems were never built to provide. Brazil is now retrofitting exactly this into Pix; Kenya’s new Gambling Control Act points the same way. As governments around the globe increasingly look at limiting social media for teenagers to protect developing minds, it is worth asking whether it is also time to introduce health warnings for digital payments — alerting users, at the moment of tap, to the very real risk that frictionless money erodes self-control and pushes vulnerable households toward overconsumption, poor consumption and debt. The choice, as with our feeds, is whether we design our tools to serve our self-control — or to profit from its absence.