It just seems to me to be a pointless waste of money having to print and distribute a piece of paper which is now obsolete in the modern age of computerisation.
Why do we need to display a tax disc on a car, when all the information is held electronically and can be easily checked by just typing in a number plate into a computer. The police now even have devices in their cars which alert them to untaxed vehicles so why not save a few quid by not having to print and distribute tax discs.