While many individuals in developed nations rarely use cash, the global supply of banknotes, particularly high-denomination bills, continues to increase dramatically, reaching record levels in currencies like the US dollar and the Euro. This phenomenon, termed the 'paradox of banknotes' by Bank of England Governor Andrew Bailey, suggests that the vast majority of this currency is not circulating within the legal economy.
Investigative crime reporter Oliver Bullough, author of "Everybody Loves Our Dollars," posits that this surplus cash is instead being utilized by criminal enterprises for illicit activities such as terrorism, human trafficking, and the drug trade. The preference for larger bills, such as the US $100 note, is due to their ease of transport and concealment compared to smaller denominations. This shift is evident in circulation figures, where higher-value bills have increasingly outnumbered smaller ones over the past two decades.
This increasing reliance on cash by criminal organizations presents a significant challenge. While governments could theoretically remove high-denomination notes from circulation to disrupt these activities, they also benefit from the revenue generated by printing currency and exchanging it internationally. This creates a complex dynamic where the production of currency inadvertently serves as a revenue stream for criminal gangs.
Europol reports have consistently identified cash as the primary financial instrument for criminals. The ease with which large sums can be smuggled across borders, often concealed within everyday items or even on the body, makes it an attractive option. Authorities estimate billions of dollars are smuggled annually across borders, with significant amounts of cash also flowing from the UK to countries like Albania.
One method of moving illicit cash across borders involves its conversion into portable luxury goods. Chinese criminal gangs, for example, are known to use tourists and students to purchase high-value items like designer bags, watches, and clothing, which are then taken back to China and resold. This practice is believed to contribute to the significant popularity of luxury outlet shopping destinations such as Bicester Village in Oxfordshire, UK, which attracts a substantial number of Chinese visitors who purchase these goods.
The proceeds from illegal activities, such as the sale of drugs, must be laundered to be reintroduced into the legitimate financial system. The process involves using individuals to purchase goods with illicit cash, which are then resold. This system, while lucrative, requires careful management to avoid detection by financial authorities. Legitimate businesses can launder a limited amount of illicit funds, but front companies that declare false earnings are a more efficient, albeit risky, method. These fronts, which may include seemingly innocuous businesses like barber shops or sweet shops, are a focus of law enforcement efforts.
Law enforcement agencies are actively pursuing operations to seize illicit cash and dismantle organized crime networks. However, the scale of money laundering, estimated to involve trillions of dollars globally each year, means that seizures often represent only a fraction of the total amount laundered. Despite the increasing digitization of financial transactions, the appeal of physical cash for illicit purposes remains, a testament to its enduring role in the shadow economy.