I’d not heard of the ‘Dutch Reach’ (using the hand furthest from the car door to force turning to check before opening a door) but it seems like a good idea. Obviously I know to check before opening the car door - but not the Dutch Reach as a habit or requirement to prevent injury to cyclists.
Thoughts on this becoming a thing in Australian jurisdictions?
That's not how road tax works; you pay the same road tax if you drive 1 cm a year or 1,000,000 kms a year. So it's not about how much you damage/wear-and-tear the road.
It's an annual payment for the right to access a safely maintained piece of infrastructure (complete with lane markings suitable to your vehicle).