There are more than 2000 billionaires worldwide with a combined wealth of $13 trillion. Some say they’re good for society, others call them a symbol of inequality.
Even though many billionaires donate to philanthropic causes, there is growing scrutiny on how they make and spend their money.
We hear from Simon Jack, the BBC’s Business Editor, about how people get rich nowadays - and why tax is such a hot topic.
And Mahayle Khonziwe, who campaigns against inequality, joins us from South Africa to share why she thinks billionaires are bad.
But, what do you think? Do you think billionaires are a good thing? Send us a WhatsApp on the number below.
Email: whatintheworld@bbc.co.uk WhatsApp: +44 0330 12 33 22 6 Presenters: Hannah Gelbart Producers: Mora Morrison and Julia Ross-Roy Editors: Verity Wilde and Simon Peeks