It's a bit of a generalisation but I don't believe that bad drivers magically become good drivers at different points of their journey.
Possibly, but a recording device that is only triggered when licence conditions are actually breached is hardly a big brother method.
Again, more assumptions:
1. That exceeding the speed limit (read not blindly following the rules) regardless of context automatically equates to being a "bad" driver.
2. That said "recording device" is only "triggered" when license conditions are breeched.
Expanding on the latter, said device would have to be constantly monitoring the vehicle's speed (presumably via GPS) and as such it would be possible / likely that this data could be monitored by a third party and subsequently misused / lost / sold / whatever as has been seen time and again with metadata gathered from private individuals under opaque-at-best conditions.
Are you comfortable with your movements being constantly tracked by some unidentified third party? Further, why stop at the car? Why not make everyone wear GPS tracking devices so their whereabouts can be known 24hrs a day? How about everyone being fitted with cameras that live-stream their every movement to data centres ? Surely only those who are doing something "wrong" / have something to hide should have a problem with this?
It seems our government are constantly grasping for excuses to ramp up the level of surveillance and control they subject the population to (terrorism, covid); while it remains highly question a) how effective these measures would actually be at addressing the circumstances they're sold on the basis of, and b) what repurcussions the data gathered can have for citizens further down the line.
British citizens are already subject to some of the most widespread and invasive surveillance of the western world; I'm certainly not keen to see this pushed any further.
Are you familiar with the Mark Snowden quote "turn-key tyranny"? An excellent case in point being what's happening in Afghanistan under the Taliban to those who were all too willing to put details of their now-forbidden activities into the public eye on social media.
If a driver is caught speeding will it reduce their likelihood of speeding in the future?
I guess that's up the the attitude of the driver in question. Personally when I see questionably-located speed cameras it elecits a reaction that's probably the opposite to what the Police are might have been hoping for..