Elon Musk's speculation about dead or fictitious employees comes after numerous federal workers were told to ignore an email asking them to justify their jobs. Previous government reviews found no evidence of widespread payroll fraud.

Elon Musk was again ranked the world's richest person in a new report released Tuesday, which estimated the Tesla and SpaceX CEO's net worth at $419.4 billion. The new "superbillionaire" report, first published by the Wall Street Journal via researcher Altrata,

"We’ve got to be very grateful that he is wanting to do this and investing his time, energy and money into it.”