The issue here is that most of us drive. All of us make mistakes. Few of us regard ourselves as criminals.
Bad luck, there by the grace of god ... is going to be the natural reaction of the magistrate/judge/jury. Hence the tendency to lenient sentences.
Trying to further criminalise and jail people we may identify with is unlikely to work very well.
A shift in attitude to regarding driving rather like piloting an airliner. We all would be horrified if our airline pilot acted as we we drive. Racing another plane to the runway, neglecting to obey ATC instructions, having a fag ... and how are high standards enforced here? Rarely jail or fines. If you are unsafe you lose your licence, hence job. Period.
Indeed fining folks is irrelevant. As we have seen points are what count. Or not, if it is inconvenient. But most people don't get to 12 so the deterrent is not really there. Bit easier if 3 points meant an immediate 3 week ban (with car being deposited at a compound). Then double if you had three points in the last 3 years and so on. Most would get a real taste of being deprived of our prize asset. Three moving vehicle incidents in 3 years and a re-test?
Driving while banned means it goes permanent and custodial. That's not about driving that's about contempt of court.
The norm is to regard anti-social driving as being unprofessional, inconvenient and shame making rather than criminal. Pilots delight in their skill. Why should drivers be different?
Maybe we could get together and get the CTC to lend banned drivers a bike for the period. Helpful & instructive