Maybe there’s a Star Chamber at work, under the realization that these people are immune to the normal consequences of criminal behavior.
If such a process is at work, and humans being what they are, someone will fight back at some point and some of the “killers” may get the surprise of their lives.( imagine a very pissed off financier uploading the picture of a dead would be assassin on the web!) If wealth is being stolen, you can’t hide the wealth very long....it exposes those doing the stealing in the long run. It’s just that things will get very nasty before the end games work themselves out.