On Mon, 08 Apr 2013 16:54:16 +0100, Tim Streater
wrote:

Should the same apply if I go down the shops and buy a loaf of bread,
then? Sir Costly Cashbag pays twice as much as me and I pay twice as
much the old dear from across the road?

Sir Costly Cashbag has it delivered by Fortnums, you go to Morrisons,
the old dear goes to Aldi. You work it out.