We very much recognise what that report says, which is that if you interpret the no-detriment principle as applying absolutely literally to all effects, whether behavioural or indirect, it is very difficult to arrive at a single solution. However, these are the issues that are being addressed in the negotiations, and when the framework agreement is published the noble Lord will see how the two Governments have addressed those issues.
On the block grant indexation mechanism, Smith says that,
“future growth in the reduction to the block grant should be indexed appropriately”.
There has been much talk about the need to avoid endless wrangling. We are therefore trying to make this process as mechanical as possible. The issue is how much of the growth in relevant taxes in the rest of the UK will benefit Scotland post-devolution.
With new powers come new responsibilities, and, as has already been mentioned this evening, the debate is around appropriate allocation of responsibilities between the UK and Scottish Governments and what is a fair division. The UK Government continue to manage UK-wide risks and the Scottish Government manage marginal Scotland-specific risks. To give an example, if there is a UK-wide recession, there will be a smaller block grant deduction to shield Scotland from UK-wide impacts because the growth in UK taxes will be lower. We have achieved agreement before with the Scottish Government for the Scottish rate of income tax, which is indexed against movements in corresponding UK Government tax.
The key issue, which has been raised in the debate by the noble Lord, Lord McFall, and other noble Lords, is how population change is managed. The UK Government will continue to manage the impact of UK-wide population change in all devolved areas. We are looking for the Scottish Government to manage marginal Scotland-specific changes. The Scottish Government already manage these changes within Barnett, and John Swinney, when he appeared before the Scottish Parliament Finance Committee last summer, accepted this.
The UK Government’s proposal, which is contained in the Chief Secretary’s letter, addresses this population concern and we are prepared to share the risk. The model we have tabled recognises that Scotland’s share of income tax revenue is less than its population share and it ensures that, like Barnett, the tax adjustment takes account of changes in Scotland’s population. So if Scotland’s population share falls then so will the tax deduction.
However, let me be clear: we cannot agree something where the Scottish Government are not accepting their fair share of population risk. Why? If it is right that Scotland retains all the growth in its own tax revenues, then it is difficult to explain as fair that a fixed proportion of growth in the rest of the UK’s own devolved tax revenues is added to the Scottish budget irrespective of how good or bad are the policy choices of the Scottish Government and the relative performance of the Scottish economy as a result.
8 pm