Professor Philip Lane:

That is another domestic decision. The decision on tax rates is clearly one for the political system to make, but nothing is cost free. It is not cost free to have a situation where there are deferred tax assets. Equally, if there is a decision to use a sunset clause in dealing with these matters, there will be consequences. Any decision should be based on the analytics and also political judgments on who would bear what costs. It is not a cost free decision to say that should be let through because of a sunset clause.