Rupert Murdoch used an after-dinner speech to the world's most powerful finance ministers to argue against the widespread quantitative easing adopted by central banks, arguing the policy was increasing the gap between rich and poor.

The News Corporation chairman last week addressed the G20 finance ministers – who were in Washington DC for the annual meeting of the International Monetary fund – at a private dinner hosted by Treasurer Joe Hockey.

Low interest rates and governments printing money push up the price of assets, rewarding the wealthy owners of assets, Mr Murdoch told his high-powered audience.

Mr Murdoch's attendance at the dinner prepared by Serge Dansereau of Sydney restaurant Bathers' Pavilion and held at the Library of Congress has been reported, including the fact the media mogul made it with only minutes to spare.

However, the contents of his address have remained confidential until now.