Earlier quoted context omitted.
I think you completely misunderstood my comment. If you have an hour of video footage of a blue car that you happen to collect from an aircraft while tracking a suspect then on it's own that says vary little. Historically you need to track a suspect to there car and then follow a car so together it's vary labor intensive to track large numbers of people. However, if the blue car passed a license plate reader it stops…
And how do they automatically detect the criminal wrongdoing being committed by that car or its occupants? That is the part I don't get. Yes if they decide to look for John Smith, License plate 1AMJ0HN, then they can probably automatically find his car in that footage, and they can watch that footage to see what he was up to. But watching that footage and figuring out if he did anything they can prosecute him for is…
I suspect if you wanted to harass your ex-wife, or a dissident, then overhead footage of their car for a few hours would provide a multitude of crimes.
Sure, if you actually prosecuted everyone that's one thing, but selective enforcement plus mass surveillance is a very powerful and easy to abuse tool and you don't need anywhere near 100% coverage to make this effective.