It's not that much of a stretch.
In 1974, scions of the Bunge y Born business, were kidnapped and only released after the payment of a $60 million ransom.
https://www.nytimes.com/1975/06/21/archives/argentine-ransom-is-put-at-60million.html
In 1996, Victor Li Tzar-kuoi, son of the Hong Kong tycoon, Li Ka Shing: Kidnapped by Cheung Chi Keung, AKA "Big Spender". He was released after the world record payment of a HK$1,000,000,000 (US$134,000,000) ransom.