Should Musk be sued for slander and defamation?

Elon Musk (and Trump) has been casually throwing around accusations of extensive criminality, incompetence, and corruption within numerous federal agencies without offering a shred of proof, and acting upon those accusations without giving the personnel he's accusing a chance to defend themselves in a court of law.

In the process, he's destroying the credibility and trustworthiness of those agencies, the United States, the individuals and the companies doing business with them.

That seems grounds for lawsuits against him for slander and defamation of character by individual agency heads, personnel and the various companies he's accusing. He should be hauled into court to prove his allegations specifically, case by case by case. Is there any legal doctrine that amplifies the charges when the slander is deliberately malicious?

If the rule of law is to mean anything, then no one should be allowed to make wholesale claims as he has without being required to furnish proof of the charges. Allowing Musk to destroy agencies, careers, and lives based upon his unproven allegations is criminal in itself. If another non-wealthy individual made such allegations that caused economic harm to a corporation, you can bet they'd be seeing the inside of a courtroom.

I think this would be the best way to stop him, since it would be very easy to prove his allegations are lies, and furthermore, lies intended to cause harm to the United States. If convicted, each and every individual he has slandered should be awarded damages equal to 20 times their annual salaries, his companies barred from doing business in the US, and he should be jailed for life via consecutive prison sentences for each count.