First up:
A Big Mac in the UK cost 1.94 GBP (25th March 2006 Price).
Fuel cost 98.4p per Litre (Avg of UK wide price as of Today), importantly a whopping 70% of this is TAX, so unless you start looking at the total tax situation it is meaningless.
Secondly:
AJ was talking about Market rates - your argument is irrelevant from that point of view.