I would never pay a single unit of currency for such a car, even subsidized, and neither would most of humanity, including politicians.

I see plenty of very dangerous driving within speed limits, ie people unable to keep in their lane, playing with cellphone, randomly breaking in semi-empty roads and so on.

These are my experiences from highways from most weekends. In towns, speed limits make much more sense and could be enforced by speed bumps or stationary radars