Beasley is also quoted in the interview as saying: "$6 billion to help 42 million people that are literally going to die if we don't reach them. It's not complicated."
Responding to Musk's tweet, Beasley said that while the headline was misleading, a $6 billion donation from the multi-billionaire would go a long way.
"$6B will not solve world hunger, but it WILL prevent geopolitical instability, mass migration and save 42 million people on the brink of starvation," he tweeted. "An unprecedented crisis and a perfect storm due to Covid/conflict/climate crises."
"With your help we can bring hope, build stability and change the future. Let's talk: It isn't as complicated as Falcon Heavy, but too much at stake to not at least have a conversation. I can be on the next flight to you. Throw me out if you don't like what you hear!"
Musk returned fire and asked the WFP to share their "current and proposed spending in detail so people can see exactly where money goes".
Their Twitter interaction then quickly came to an end, with Beasley offering to show Musk the figures, saying that he would meet the billionaire in "Earth or space".
"Instead of tweets, allow me to show you. We can meet anywhere — Earth or space — but I suggest in the field where you can see @WFP's people, processes and yes, technology, at work. I will bring the plan, and open books."
Musk does not appear to have responded.
Estimated to have a net worth of US$315.2 billion (NZ$438.9 billion) by Forbes, the tech entrepreneur wins the title of the world's richest.
This comes as his wealth ballooned by a massive US$25 billion in October after car rental company Hertz purchased 100,000 of Tesla's Model 3 sedans. The move caused Tesla's share price to skyrocket jumping by US$25.6 billion (NZ$35.6 billion), a rise of 13 per cent.
He is followed by Amazon founder Jeff Bezos (NZ$202 billion), the CEO of luxury goods company LVMH Moët Hennessy – Louis Vuitton SE, Bernard Arnault and Microsoft founder Bill Gates.