"There is no magic money tree" says Institute of Fiscal Studies
as it prepares to attack Conservatives, Labour spending plans.
"The Tories will be hauled over the coals over their unfunded spending pledges and planned cuts, while Labour will be skewered on how much it'll need to borrow and its vague deficit reduction plans" says Daily Telegraph blog.
Which is exactly what the LIberal Democrats have been saying in this General Election campaign