He doesn't have to be an expert. Malcolm Gladwell is not an expert at anything but he knows how to translate things into more readily understandable form. However, Gladwell often goes too far on sharpening and leveling and gets it wrong at times.I guess you can say having read several of Michael Lewis' books that I am a fan. I generally enjoy his books. However, I would stop short of calling him an expert on:
Silicon Valley
Baseball Management
Tennessee Football Moms
Heuristics
Cryptocurrency (The New York Times wrote of Lewis's extensive access to Bankman-Fried that he had "a front-row seat—from which he could apparently see nothing.")
Getting the picture.
Last, but not least, I would not consider him an expert on government efficiency simply because he spoke with some government employees to write a book. From what I have heard, the book has a strong political overtone and did not investigate the other side of government effectiveness. Then there's his lack of management experience.
Lewis does similar things, although he had worked on wall street thus knows how financial shit works from the inside. One of the things he reports are numbers of rural folks who think the government is bloated etc but are shocked to find out a lot of the stuff they depend on comes from government programs. Just like those people carrying signs that say "keep your government hands off my medicare!!"
The vast majority of Americans don't know what is going on inside of government because governmentcant advertise. The info is there, BTW, but nobody is taking the the time to find out and read their web pages etc. Thus the government is handicapped in that it cannot advertise about all the great stuff it is doing. It can only educate on a specific program to instruct people what to do but those releases have to be approved. Those who hate it can spend unlimited time and money trashing it however.
And who is the government? Americans. Who funds their work? The congress. When musk says he's defeating bureaucracy to allow democracy, he's got it exactly wrong. Congress made and funded the programs and agencies. They were elected by citizens to do so (democracy). Musk (unelected) is unilaterally taking the power he does not have and overriding what the people, through their elected representatives, created. That doesn't seem like democracy to me.
I've already said multiple times there is a way to do this that does preserve democracy and I'm all in on that. Clinton-Gore did it. But that takes effort and brains. This is simply destroying things then lying about it. It's stupid beyond fathom, unless you simply wish to destroy it forever and then this makes sense.