Never mind trying to punish the young for daring to be young.
The best way to reduce overcrowding and Deaths on the road is to make it incredibly expensive to own and run a car, you could relax the test and licence criteria if a full tank cost say £2000 and a set of tyres was ~£5000 I’m sure everyone would moderate their speed/behaviour and reduce their use of cars…
Young drivers aren’t generally the worst in my opinion (some are shocking of course) but the most common, worst offenders (Mobile clamped to the ear, doing 45 in 30 limits, regularly pulling decidedly sketchy manoeuvres, tailgating, etc) have to be middle aged males in Mondeo/Vectras/406/A4/Passat/etc basically “Mr Average” closely followed by the Dippy Cows in Range rovers and MPVs driving Tarquin and Hermione to school, what makes it worse is that these are apparently relatively “Experienced” drivers…