What do you believe is the single most important factor driving up the cost of living in Nigeria?

'Lack of predictability'

In the U.K. and Sweden, he explained that employee social security payments deducted from their stock rewards are "uncapped," meaning that staff at companies in these countries stand to lose more than people at firms in, say, Germany and Italy where there are concrete caps in place. The higher a firm's stock price, the more it must pay toward employees' social benefits, making it difficult for companies to plan expenses effectively. Britain and Sweden also calculate social benefits on the actual value of employees' equity upon sale in liquidity events like an IPO. "It's not that companies are not willing to pay that," Siemiatkowski said. "The biggest issue is the lack of predictability. If a staff cost is entirely associated with my stock price, and that has implications on my PNL [profit and loss] ... it has cost implications for the company. It makes it impossible to plan." In the past year, Siemiatkowski has more clearly signalled Klarna's ambitions to go public soon. In an interview with CNBC's "Closing Bell," he said that a 2024 listing was "not impossible." In August, Bloomberg reported Klarna was close to selecting Goldman Sachs as the lead underwriter for its IPO in 2025. Siemiatkowski declined to comment on where the company will go public and said nothing has been confirmed yet on timing. Still, when it does go public, Klarna will be among the first major fintech names to successfully debut on a stock exchange in several years.

• Read More