IrmaLaFey- valid point and it is often the middle that is less vocal than others. The bright children of middle of the road schools in middle of the road areas are the ones going to be left wwhether its worth making an application at all.
Titchy - OK Oxbridge is accountable to the government ultimately and is funded to some extent publicly but I would questions whether the DoE would micromanage aspects of policy.
The argument that a B in a bog standard comp is equivalent to the A star from Eton does have flaws...
The A level by definition is an objective assessment of ability that is standardized more or less across the whole country and is closely monitored in terms of standards. The whole point of a universal examination is that it removes the school as a factor and wholly tests absolute ability (in the interests of fairness)
If we start equating one grade from a school with another from another school we are in effect undermining the examination by allowing our personal judgment (of the child's circumstance) influence the value of a particular grade.
The logical conclusion to such an argument would be allow schools to set their local grade boundaries determined by school intake, levels of disadvantage etc or have some sort of relative A level grade introduced. The point is an A level is an absolute measure not a relative one.
The reduction of offer grades could lead to stigmatization of applicants if made known. You also risk having candidates unable to cope with the course as they have achieved poorer than expected grades for the course with the hope that the untapped unquantifiable potential that led to the low offer will surmount this.
With non-oxbridge universities where student limits are a little more flexible unscrupulous institutions could accept low tariff individuals, pocket the tuition fees with the risk of the student achieving a low degree classification or dropping out.
Wider access is to be commended but should not come at expense of educational standards.