> Prices are set by each company and registered with the government. They cannot change them each day, and they have to apply to all cars. It does mean that some firms are more expensive (nicer cars, better service) and some are cheaper. There are also some that are better for short trips (low flag fall, hugh cost per Km/Mile) and others for longer trips.

I guess there's an argument to be made for allowing more flexible pricing. Keeping the requirement that prices should be public might be worth it, though.