Your figures are embarrassingly one eyed. The commonly held belief in Scotland regarding "ALL OUR OIL AND GAS REVENUE" is so incredibly short sighted. I've worked for several oil companies and I come from Aberdeen. The oil and gas revenue does NOT make Scotland in surplus, nor is it all Scotland's.
The politics of the SNP government in Edinburgh have been distinct for quite some time. Not a peep comes from Alex Salmond's lips without some underhand comment about Westminster being to blame or holding us back. The task in the UK is to balance the budget. Scotland as an independent nation would never have been able to bale out the banks - regardless of what ideas you peddle as the "truth".
The financial "shit" in Scotland can easily be traced back to our two big banks fighting it out to take over NatWest. From that point on, financial controls at both banks started to slip and were never checked back to reality. The result is plain for all to see. Wasn't helped by the Chancellor Gordon Brown loosening the controls on the banks on a near yearly basis. Our two big banks took a path of richness that ended up in the financial mess we are all in. They weren't alone, but to try and pin the financial crisis on England is simply ridiculous.
We are stronger as a whole. I'm British, Scottish and Aberdonian. Don't bother questioning my loyalty to any of those. But perhaps because I live and work outside Scotland gives me a broader outlook. Every country has a favourite target to hit. England just can't get over Germany or Argentina being an enemy at football. As a nation, we seem to pick England as the enemy for anything we choose.