Not a cat in hells chance !! For one it would render thousands of people jobless and that's the last thing the government wants after unemployment is through the roof already !! Plus they would take a huge hit on fuel revenue as people wouldn't have second cars like supra's etc that are gas guzzlers. So that's no extra fuel money, no second tax disc and no second insurance policy. They would have to be on crack to think this was a good idea, plus places like santa pod and most of our race tracks would fold as most of their clientele is road legal track cars and modified cars.
Just imagine how much people spend on going to meets, events and track days in fuel, food etc that they would otherwise not have spent.