In addition, "workfare" is a well-tested approach that has given good results in the past [1] [2]. What's to stop someone on UBI from joining a gang, anyway?
This particular verb with the word crime--may I ask if you are an American? I've only ever heard people who are not from America say it this way. Americans always seem to say "commit" crime.
[1] https://en.wikipedia.org/wiki/Public_Works_Administration
[2] https://en.wikipedia.org/wiki/Federal_Writers%27_Project