Finance Bill

The hon. Gentleman used the word ““principle””. I hope that he agrees that a good principle remains good even if someone in the past has breached it. If some past Government or Government of a different complexion have breached it, that in no way negates or reduces its importance. Surely he does not seriously suggest that different tax rules—in the case that we are discussing, different rules relating to retrospectivity—should apply to goods and to services. He has a background in economics and he knows that there is no foundation for such a distinction in the science of economics.