It will be entirely a matter for the Scottish Parliament to raise the money. You ask a question, you get the answer. If Scotland lost that pooling, there would be an additional £7.6 billion gap in Scotland’s funding.
During the general election in Scotland, the SNP First Minister indicated that they wanted full fiscal autonomy and control of everything in Scotland. Then the penny dropped and it became that full fiscal autonomy would need to be negotiated over a period of years, so that cat is out of the bag.