Possibility of satellite technology

While so much effort and resources have been invested in satellite technology to track cars on the road, car speed and cars going through ERP gantry points or causing jams, now there is a better use of such leading edge technology. Instead of wasting such resources to become more efficient in collecting tolls, I would suggest that we use it to tag prisoners. Then we can keep track of their every movement. We would definitely know if they are in the toilet if they said they are going to the toilet. And if they escape, if will be a piece of cake to track them down. Satellite technology must have some better use than tracking cars on the road.