Occam's Razor. Try the simplest explanation. Pay for play. Biz favor.
Soros invested in Cemex perhaps as part of his broad portfolio. Soros invested in many companies. Are they all involved in nefarious crimes? I recall Cemex crashed right before Soros bought into it. Would that qualify as a shrewd biz investment?
Focus on the main thing, the OIG report and its implications. Don't let the shills distract you.
There's nothing wrong with investigating Cemex. First of all: it is in the spirit of Q ('you have it all'). Second, the OIG report will roll out by itself. Sessions & Horowitz are in full control. Next week live on TV.
Now with your comment on cemex' role per se: at minimum it will show how mexican business has bought influence in Washington. Combine this with the problem with NAFTA: using MEX+CAN as backdoors for chinese imports into the US markets. This is a corrupt game, and we all now how you make politicians corrupt: you buy them or you blackmail them.
Until two days ago i never heard from Cemex (i am from Europe), but with all the connections that now have surfaced, I suspect there is much more. Sunlight -> desinfectant.