Alex Salmond has pledged that one of the first actions of an independent Scottish government would be to "scrap the Bedroom Tax".
He compared the opposition to the so-called Bedroom Tax to that against the Poll Tax, and said it was a "symbol of why independence is necessary".
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The Foreign Secretary was unable to rule out the possibility of continuing to pay money into the EU when he spoke to Peston On Sunday.
He told Peston on Sunday: "The country is crying out for leadership from the Prime Minister. We want to know her vision."
All the profits from the sale of each download of the forthcoming single would go to Shooting Star Chase and Together for Short Lives.