I like the general analogy, but the author's case seems to be that there are evil crooks at all income/wealth levels, but there are also good people at all income/wealth levels and so we shouldn't demonize (and tax?) people based on income/wealth alone.

I guess that's a logical argument that could stand in its own merits, but it seems to be missing out on some important facts about the real world.

Like, I'm really not sure what he's getting at nor who he thinking is deeming (moderate) profits to be bad / undesirable at a society level? This feels like something I would have written right after reading Ayn Rand's works in college: lots of pronouncements about the righteousness of hard and smart work without having seen how the systems of the world work in reality.