Spain's continuing national debt crisis has already put the country's future in the euro in question, along with the future of the single currency itself. Now it has had another effect, unwanted in the rest of Spain, by fuelling demands for Catalan independence. Fed up with effectively paying more to Madrid than the region receives back in central government funding, the region's own government, centred on Barcelona, has already gone cap in hand to the national treasury to ask for a bailout of its own debts.