If it were about safety, they wouldn't be driving a hundred miles an hour down residential streets, and there wouldn't be a finite number of medallions.
Let's use another regulated field as an analogy: medicine. You have to receive extensive training and receive government certification in order to become a doctor. This is to protect your future patients against someone who knows nothing about medicine, which we can all agree is fair. Here's the difference between being a cab driver and a doctor: if you are qualified to be a doctor, you can be a doctor. But to be a cab driver, you have to buy an arbitrary license from the government of which there are only a finite number of. You could be the safest most wonderful driver in the world, but without that arbitrary piece of metal bolted to your car, it's illegal for you to drive anyone around.
Medallions are not about safety. They are a government subsidy for cab drivers.
Let's use another regulated field as an analogy: medicine. You have to receive extensive training and receive government certification in order to become a doctor. This is to protect your future patients against someone who knows nothing about medicine, which we can all agree is fair. Here's the difference between being a cab driver and a doctor: if you are qualified to be a doctor, you can be a doctor. But to be a cab driver, you have to buy an arbitrary license from the government of which there are only a finite number of. You could be the safest most wonderful driver in the world, but without that arbitrary piece of metal bolted to your car, it's illegal for you to drive anyone around.
Medallions are not about safety. They are a government subsidy for cab drivers.