I try not to argue about this subject too much on here, but I'll admit I get a little angry reading things like this. You've said that jobs are increasingly concentrated in the South-East, for instance, but Scotland has a lower unemployment rate than the rest of the UK. In fact, Scotland has one of the lowest unemployment rates in Europe.
That's the problem I have with these arguments - it's the politics of grievance and the facts of the matter seem to get overlooked in favour of emotional appeals about London stealing all our resources and whatever else. We regularly hear about us generating more tax revenue than we receive in spending (complete with emotive examples such as Crossrail), but the Scottish Government's own figures had us generating 9.1% of UK taxation revenue last year and receiving 9.3% of UK spending. Of course that varies year on year, but it's pretty difficult to take that argument seriously going forward when the very last year had us in a surplus (and oil revenues are on a downward trend by anyone's estimate so that's hardly going to move in the opposite direction long-term).
I voted No, but I don't have anything against practical arguments for independence. It's an open debate - some people think we should go our own way, some people think we're better off in the UK. That's completely fine as a practical argument, but I have a real problem with the kind of divisive blame politics that we keep hearing about - arguments where we pretend we're some downtrodden minority being exploited by our bigger neighbour, our resources are being siphoned off, and Westminster/London are essentially the root cause of every ill in society.
That's not a practical argument, it's just nationalist scapegoating and I think we'd all benefit (independent or not) from putting that kind of populism to one side and just judging things on a level headed, rational basis. You'll find people in Scotland agree on a lot more than they disagree on if we just get round a table and start talking about the details of devolution.
Of course its politics of grievance - all politics is driven by grievance, you make it sound like its some kind of petulant whinging. There is overwhelming evidence that Britain is one of the most centralised economies in the developed world, with London and the SE hugely out of kilter with the rest of the UK. Partly this is historical and geographical with London the natural conduit between Europe and America, but it has not been helped by the political classes, particularly with the decline of traditional industries. I have always been an SNP sympathiser, and long believed that Scotland's role as an independent European nation could only be beneficial for all parts of the UK. The rise of UKIP makes me even more convinced of this.