The vast majority of "civilian crimes" are crimes of passion, desperation, or being actually mentally incapable of reasoning about consequences.

That is not what these crimes are nor who commits them. These people actually tend to speak with lawyers prior to committing their crimes, and their lawyers will report something between "not technically illegal" to "probably illegal and the penalty is [something you really don't care about at all]"

We can, should, and in fact already do have whistleblowers as well. But all you're doing is (slightly) raising the chances that you get reported. There are still many, many corruptible steps from that to being investigated, then from being investigated to being convicted, then from being convicted to being punished.

In fact, as we've already established, the actual "punishment" is frequently not a punishment at all. It's just the cost of doing business.

Consider these responses to an executive asking their lawyer for guidance on a legally ambiguous but clearly antisocial decision (where most of these decisions land):

Response 1: "Not clearly illegal, we could argue it in court, and if we lose the penalty is a couple million dollars."

Response 2: "Not clearly illegal, we could argue it in court, and if we lose the penalty is you going to prison for the rest of your life."