Think about what would happen if there was no WDC. Each team would put equal amount of effort into both of their cars, with an emphasis on car development, as well as driver skill. Im quite sure that before 1980 (or somewhere around that time) the WRC had no WDC, and it was just a Manufacturers Championship. In a sport like F1, to make this possible, huge spending cuts would have to be made to closely even out the field, but what if 3 teams where dead even? With the car being the key point here, engineers and designers would push as hard as they can to create innovative solutions to problems, and maybe the FIA would allow things such as the F-Duct, or the EBD, or turbos, as creativity would be the key to success.
I know it will never happen but I wanted to hear your opinions on this idea.