co-founder of Duty Free Shoppers Group, the travel retailer of luxury products based in Hong Kong

Sort of squeezing second-hand. But you have to know his primary client pool is the business elites passing through international airports and taking advantage of a legalized form of tax evasion while exploiting the working class in sweat-shops on the mainland/surrounding Pacific islands.

A bit like becoming a billionaire by selling yachts or luxury hotels or cocaine. Even if you can argue you didn't abuse your staff to make your mint (spoilers: you absolutely did), you know all your biggest customers did.