New York (CNN Business) Mark Zuckerberg, the fifth richest person in the world with many billions of dollars to his name, said he "understands" where Bernie Sanders is coming from when the Democratic presidential candidate says billionaires shouldn't exist.

Facebook FB "I don't know if I have an exact threshold on what amount of money someone should have, but on some level no one deserves to have that much money," theCEO said during a town hall event at the company's headquarters on Thursday in response to an employee question about Sanders' comments

"I think if you do something that's good, you get rewarded, but I do think some of the wealth that can be accumulated is unreasonable," he said at the event.

In an unusual move, Zuckerberg decided to livestream the company event after audio from internal meetings conducted in July was leaked and published earlier this week. (He said Thursday that the company believes an intern shared the audio recording.)