I think that you misunderstand the situation. Your poetic take: "People carried along by their greed, guided to disaster by golden tongues, carriers of a disease that will spread like--well, like a pandemic on steroids. All of which initiates a plague of financial collapse that will wreak havoc on lives well beyond the cocoon world in which they operate, and sow chaos for years thereafter." It's not even clear that if this were true it would signify a neo-noir tag for the movie.
The review explains, towards the end, what I thought then and still think. The evil is systemic, caused by instituting systems that unduly privilege certain interests. The quest for wealth underlies these misuses of power, and that may or may not be called greed. The quest exhibited by the players, especially the traders and analysts, is not the enabling force. That's why the impact is weak on me and why its success as a neo-noir is muted.
But if a movie demands simplification and is satisfied with metaphor, then so be it, but to me it's a weakness in the movie if no other avenue of exposition was possible.
The question is not so much whether a crime or transgression is physical or tangible, but whether the movie brings it out properly, i.e., identifies it correctly as the key driver, even if realism is not an essential. It's not even clear that greed is the correct driver as a metaphor. That's an uncontrolled and excessive drive for wealth. The bailout system we have traces all the way back to the National Banking Acts of 1863 and 1864. This was the baby of Lincoln and Chase. The motivations for it and its replacement, the Federal Reserve, are complex.
Chaos gets sowed "for years thereafter" when a bad system is propped up and the big guys are not allowed to fail. Even if we do not go back to 1863, we have steps taken since 1971 that cause what you call a "financial plague". Metaphor doesn't cut it, is what I'm saying, in this movie's communication of the reasons for the havoc, chaos and collapse of which you write. It would have been rather easy to insert some player with some dialog who made clear that there were deeper forces in play. The movie could have benefited by some such depth.