The phrase "benefits bill" refers to a document or law that outlines and organizes the monetary assistance provided by a government to its citizens, such as welfare, unemployment benefits, or social security. Full definition
... supporting small businesses, helping people aspiring to buy their own home, reducing waiting lists, and easing upward pressure on rents and housing benefit bills. (politics.co.uk)
While the coalition wants to cut benefit bills, Labour seems to oppose all the welfare reforms — which are popular with the great majority of voters. (lordashcroftpolls.com)
We show our determination to do this fairly, with further savings from bureaucracy, from benefit bills and the better off. (politics.co.uk)