The chief information officers of at least three major government agencies have been replaced by Silicon Valley executives, including from Palantir and Elon Musk's SpaceX.

Over the years, Musk and his businesses have received at least $38 billion in government contracts, loans, subsidies and tax credits, often at critical moments, a Washington Post

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.

Almost two-thirds of the $38 billion in funds were pledged to his businesses in the past five years, per the report.