Should drivers face psychometric tests every 5 years?

[Hunter]

Was reading the thread about the elderly couple dying as a result of a 'drag-race' and I raised the issue of psych tests for drivers - I firmly believe that every driver should face psychometric tests every 5 years - perhaps it would weed out the drivers who are flippant towards driving. I mean if you want to become a policeman you need to pass a psych test, if you want to be in the army you need to pass a test - it seems that they take their lethal weapons seriously so why not the transport dept? Pilots aren't allowed near their aircraft without a full medical and I believe in some cases a psych test (there's been rare cases of pilots going crazy and crashing planes deliberately).

I know I can be a slightly aggressive driver (mostly yelling out the window when some moron just about wipes me out or does something dumb) but I've seen drivers speeding without any regard for conditions or whether or not its appropriate to speed. The number of drivers who speed through Brisbane CBD astound me, even at the speed limit it is not safe due to the Dumb Pedestrian Factor.

Anyway, what do you guys think?