Half the problem is that drivers are being paid based on exactly such a device.
And your second paragraph is just a series of non-sequiturs. You're stretching too hard to make the cute analogy. Measuring doesn't imply that all vehicles need it. Nor does that in turn imply the need for a licensing system.
I couldn't think of a better one in less than a minute. Do you have word suggestion? It's pretty close to an analogy, as a hypothetical mirror from one part of reality onto another.
Hmm no, now that you mention it. The technique probably has a name, but if it does, I don't know it. That's going to bother me now. Basically just describing existing commonplace conditions (the taxi industry) as if it were some crazy new idea, for ironic effect.
Half the problem is that drivers are being paid based on exactly such a device.
And your second paragraph is just a series of non-sequiturs. You're stretching too hard to make the cute analogy. Measuring doesn't imply that all vehicles need it. Nor does that in turn imply the need for a licensing system.