In reply to Timmd:
We will get some kind of indication of the truth if that , with personal tax in Scotland when the Scottish Government get the more flexible tax powers that will let them vary tax within bands.
At the moment, the SNP can only vary income tax across the board, so have left it the same. The received wisdom is , when Swinney can increase tax on higher earners without hitting the lower bands ( or even reducing it) that he will do that, and I' m being told by my Tory friend, that this WILL drive those higher earners to leave Scotland, and those with businesses WILL take their business' with them.