While I agree with your premise regarding the dual justice systems depending on class, in this case, the guilty party is in jail here he belongs (but likely not unrelated to the fact that he stole from richer people with more power).

Bankman-Fried had been under house arrest, but prosecutors convinced Judge Lewis A. Kaplan of the Federal District Court in Manhattan that Bankman-Fried had fed documents to the media in order to intimidate a witness in the case. Now Bankman-Fried has to prepare his defense to seven criminal charges from jail.

That was as of August, while the case was ongoing: https://arstechnica.com/tech-policy/2023/08/sam-bankman-fried-is-going-to-jail/