if we aren't good enough to drive do we get a tax reduction so we don't have to pay for the roads we're not allowed to use?
Obviously you wouldn't have a car so wouldn't have to pay road tax or fuel duty. On the other hand you would still be using the roads, by taking a taxi, bus, and buying stuff in the shops which is transported on the roads. Which brings me to the point of foreign vehicles which have even worse safety standards than us (particularly the vehicles, rather than the drivers).