Had to laugh to myself when I first heard that on the TV some time ago - our deliveries had already (unofficially)  been reduced to 3 or someties 4 days a week, but we live in a semi-rural area so figured that was why.  The postie has since told me the area was just growing too big and he wasn't getting paid any extra - so as he wasn't a happy chappy, thought that was probably an additional contributing reason !!