If you had a RFID chip in each person then it would be simple to solve crime. Let's say a person was murdered no this street corner around 1am, we could immediately know who was in the vicinity at that time and see precisely when the victim was there and stopped moving and who was there at the same time. Likewise with bank robberies and so many more crimes. But if you add in the "no buying or selling" without this chip component, it would become that much harder to commit a crime. You can eliminate money laundry and you can eliminate people fencing stolen goods.
Also, using AI you could look for suspicious patterns, suppose everything this person has bought in the last two weeks could combine to make a bomb. Or suppose they bought a few thousand rounds of ammunition, and body armor. You could see potential terrorist attacks before they happen.
This would be a tremendous savings to all people, savings from theft, savings from court costs, hospital costs, legal costs.
But it gets better, if you put a chip in the brain so that the person becomes an extension of the AI the AI would become so much more powerful and effective. You could make it a requirement for all police officers. Really, it could enhance any profession. But with just the police force I could see a 20% reduction in manpower as a result of almost all crime being eliminated, But also you could require those that are still on the force to get the chip. Whatever any cop sees the AI would also see and could send those same images to other cops, likewise whatever they hear. Likewise with any image from a camera or drone could be beamed to the cop. As long as the cops can read and speak on a 5th grade level you would have a top notch police force.
But it gets better. Suppose others also get chipped wanting access to that super computer AI. Any person in the community that is chipped immediately becomes the eyes and ears of the police. As this takes off I could see no business wanting to hire someone who isn't chipped. You can imagine how much easier it would be to manage a work force that was chipped, you could probably eliminate managers, the AI would be the manager. Likewise with accountants, lawyers, and other white collar jobs. I could easily see those being cut by 50% at least. On the flip side we have a whole bunch of minimum wage jobs that are already being replaced by computers and robots. I would think that business owners and stock holders would love this, it cuts costs significantly and gives them much greater control over their staff. Also we have solved the problem of the poor education system in the US. In fact to be chipped you would probably just need to pass a fifth grade reading comprehension and listening comprehension exam. You could eliminate grades 6-12, college and grad school.