Alistair Darling, the former Labour Chancellor and head of Better Together, had complained on Monday about the “huge disparity” in spending between the two sides in the referendum.
He pointed to big donors backing the Yes campaign and said the Scottish Government was using taxpayers’ money to promote the White Paper.
The Scottish Government has said that producing, delivering and promoting the 650-page document has already cost £1.25 million in taxpayers’ cash.