If people had to pass a drivers test every five years the world would be a better place.

1. Remove really dangerous drivers.

2. Improve the community's collective driving skill.

3. Stay up to date with rules and laws.

4. Set a good example for younger drivers.

5. Less traffic.

6. Less pollution.

Edit: Interesting discussion. Just add a bit more information, it wouldn't be a one-strike system. 1st fail = retest. 2nd fail = driver training. 3rd fail = retest in 6 months, with mandatory course to retain licence.

As far as the poor grannies that need to be driven around, if you aren't fit to drive you aren't fit to drive. As far as the cost, I think the testing should be subsidised to be made cheaper.

If I become president of the universe it is coming in.