This seems to be a very popular position on left wing sites like C&L. They don’t like it when I point out that they regularly call for treason charges to be leveled against their fellow citizens who feel the same way about states leaving the union.
The argument about economic disparity is silly. The economic transfers from wealthier regions to poorer regions is a feature of government and not a bug. In Canada we call these equalization payments but you cannot have these when every area is relatively poor. Relying for your wealth on a diminishing resource like oil is a foolish thing to do unless you are banking most of the proceeds. Which isn’t happening and could not happen if Scotland separates.

The main problem with the EC is that it isn’t much more than a customs union. It would be far more effective at wealth transfers from states like Germany to states like Greece if it were a political union. The Scots would be foolish to separate for these reasons.