They are doing that because they are entities without principles or ethics.
The solution is to create controls around them. Many, many controls.
The Sarbanes-Oxley era already solved this problem for untrustworthy humans. It's directly applicable. I created a concept I call MFIC ("Mechanically-Falsifiable Independent Control") to encapsulate this principle.
https://gist.github.com/pmarreck/b30aa3ca69cb70a5526f8a63ab8...