If you have been looking at the GERS statistics, please be aware that they do not tell the whole story and are full of anomalies e.g.
In addition, whisky consumed in the UK is subject to VAT and alcohol duty. This is assigned to Scotland on the basis of *how much is consumed in Scotland*
Surely as an entirely Scottish Product, the huge revenue generated for the UK exchequer should ALL be credited to the Scottish economy? Also Tax payers in Scotland number just short of 10% of all UK tax payers yet spending in Scotland is based on it having 9.1 % of the UK population. Remember too that Tony Blair, sneakily, moved the Scotland/England sea boundary to England's advantage, putting more oil, gas and fish into England's economy at the expense of Scotland's economy.
Also the largest chunk of Defence spending. i.e. the cost of Trident's base, is attributed to Scotland because that is where it is located. An Independent Scotland would not want this in our Country, would instead spend a more modest sum on conventional defense.
Finally, if you do take these statistics at face value, then please consider that this alleged deficit has occurred within a United Kingdom. I am sure that GNs in the North or Southwest of England would agree that there has been, for generations, an unfair distribution of wealth and Public Spending throughout this land.