Yammy As has been explained thousands of times Scottish taxes/revenues/etc. sent to Westminster from Scotland vastly exceeds the sum sent back to Scotland via the Barnett Formula. The difference between money collected and money returned is supposed to cover UK wide expenditure which means that Scots are contributing to road & Rail improvements which do not extend over the border, whereas the Scottish Government alone had to foot the entire bill for the Queensferry Crossing. Another blatant example was the fact that the UK government contributed not a single penny to the highly successful Commonwealth Games in Glasgow, (costs met by the SG and business sponsorship), but made a substantial contribution to the Olympic Games in London, which left a legacy of improved infrastructure for London - partly funded by tax payers in Scotland. Scots also have to contribute to repairs to Houses of Parliament, Big Ben, Royal Palaces, the House of Lords and so on - all expenditure that dose not contribute anything to the Scottish Economy.
I could go on all day with examples - suffice to say that when Scotland leaves the UK and is no longer contributing to the betterment of London and the SE, nor the UK's nuclear weapons, repairs to Westminster and Royal palaces, etc. etc AND is on the other hand charging the RumpUK for all the water, electricity. oil and gas, (which Scotland has in abundance with excess to export, and England needs ). Currently these assets cross the border with no monetary advantage to Scotland's economy - Indeed Scotland is charged to put their surplus electricity onto the National Grid, while Power produced near London is given a bonus payment for adding it to the grid. There are too many other examples to list them all here. Check out/google what economists have to say about the economy of Scotland after Independence - They are all agreed that Scotland, because of her assets in land, sea, wind, water, oil, etc. and a highly educated population, would be the richest part of the British Isles and welcomed with open arms back into the EU.