Snowball
The law already provides for those convicted of serious offences to have to take a test, usually an extended test. For some offences this is automatic.
But it is not implemented enough, then.
So far as RTCs are concerned, the sheer numbers involved would make this impractical. There are about 4 million insurance claims p.a., so we would need at least three times as many test examiners as we currently have.
All cases would not necessarily be liable to retests. The examiners seem to have coped readily with the mushrooming of driving schools, so I don't accept that this amount of additional testers would be required.
It also seems contrary to natural justice for someone to be subject to what is effectively a criminal sanction without the protection of the "beyond reasonable doubt" test, and effectively at the whim of unaccountable bureaucrats. Most accidents are fairly minor, and a compulsory retest is a draconian punishment for a momentary lapse which, under the criminal system, would be subject to a fixed penalty or a low-level fine.
I certainly would not class the police and the courts of being "unaccountable bureaucrats".
Over time, the readiness of people to break the law has increased significantly. Anarchy cannot be allowed to rule, so we must all tolerate conditions that might seem to impinge on our freedom.
Is the answer to do nothing? 600 extra, armed police have been deployed in London, to combat what is perceived as an increase in risk of terrorism. But far more people die or are seriously injured on our roads annually than are killed/maimed by terrorist activities.
The loss of life due to road deaths is no more tasteful to relatives than death from a terrorist's bomb, and is just as final for the victims.
It does worry me that road deaths/injuries seem to be becoming evermore acceptable as a natural event on our growing abundance of vehicles on our roads.
Sorry, but where any form of lawlessness exists, I have always believed in the fear of consequence. In my formative years, that fear started with my dad, and not because he wasn't a good parent - I was taught that doing wrong carried a suitable penalty. Today's kids are protected from corporal punishment, resulting in people reaching adulthood with no qualms about committing a crime (including driving in a way that threatens lives), so someone has to take over the big stick to keep order.