Space and postcodes

Would it not be nice to have in the near future the telephone directory as follows?

Instead of having the phonebook with surnames in alphabetical order it would be the city/village/town that would be listed alphabetically. In this way, one saves a lot of space (and paper) because the name of the city/village/town would not have to be included with every single address.

If Maltacom wishes, it can use the space thus saved to include the postcode. If I remember rightly, Maltacom had said it is not its duty to provide the postcode because one would really be looking up just the telephone number.

Nevertheless, I believe there is nothing wrong to include the full address, plus the postcode, in the phonebook.