In my scifi stories the way crime is kept low is what is called the ‘rank system.
You can read in detail about it here: https://vayneline.com/concepts-terms/rank-system/
Essentially, when anyone commits a crime they are assigned a bounty and a point value based on the severity. Criminals can turn on each other to gain the bounty but to also reduce their own crime. Thus there is a ‘traitor’ element to crime now so that people can redeem themselves by turning enough other criminals in.
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