

It’s because that was his day job. Somehow. It’s what provided the means for his hobby of diddling kids.
https://en.m.wikipedia.org/wiki/Jeffrey_Epstein
He never finished his college degree, and after dropping out ended up teaching math at a private high school. He got fired for performance issues (and perhaps getting a bit too close to his students), but had made friends with one of the parents of a kid at the school, who happened to be an executive at Bear Stearns. He got a job trading options, and eventually spun that out into his own consultency, where he made more money than he (or anyone) really deserved to. He seems to be a chronic failure, but knew enough key people so that he could always fail upwards.
There are a lot of really weird coincidences from his early career, though: that High School was run by Bill Barr’s dad, Donald. (yes, that Bill Barr, who was Trump’s AG at the time Jeffrey Epstein “killed himself” in jail.) And Donald Barr actually wrote a trashy sci-fi novel in the early 70s in which sex trafficking of teenagers is a key plot point. Enough coincidences to keep conspiracy theorists going for decades.
Look on the bright side! All this money is going to be contracted out to companies that these new oligarchs control, and by the time they funnel most of the money to their wallet only a handful of new prisons will actually get built. We will have to hope the grift can get in the way of the the new Holocaust that Stephen Miller is planning,