You do realize that for at least the past year, the only reason the employment reports have had a positive figure is because the government is hiring more people than the private sector is laying off? That's unsustainable.
https://www.statista.com/statistics/204535/number-of-governm...
Plus, how much of stuff it used to do internally 40 years ago are now done through subcontractors and delegated to private companies? Meaning even that number is now doing less than 1980?
I think it was just another campaign tactic, theater for the masses and the reality is very different. It's programs that cost the American people the most so if Elon and Vivek want to save money, they will need to look at programs like SS, Veterans benefits, Medicare, Education, etc.
That would cut 4,400 employees -- most of whom are tasked with administering funds like Pell Grants. Those funds are mostly matters of law, so I'm not sure if the goal is to just not actually follow that law, or what.
If you did indeed stop following that law, you could save a goodly chunk of money -- over $200 billion. But the actual employees are only a tiny fraction of that cost, so firing the entire staff would save far, far less (perhaps half a billion.)