It’s a bite in Mexico, a sweetener in Britain, Tea money in Cambodia. Why do we collude with corruption when it’s unfair and costs us billions of dollars?

Nastaran Tavakoli-Far examines the moral quandaries we face when asked to pay a bribe. She talks to a whistle-blower, a businessman imprisoned for corruption and experts and ordinary people affected by bribery in different parts of the world. It’s estimated that 1.6 billion people have to pay bribes just to access public services. When so many countries have signed up to fight corruption, why is it so difficult to stamp out?

(Photo: Handing over cash. Credit: Getty Images)