The Prime Minister said he 'personally struggled' with the Office for Budget Responsibility's (OBR) approach in assessing a package of welfare reforms in the Spring Statement.
BBC Verify's Ben Chu looks at how the Chancellor managed to stick to her fiscal rules in the Spring Statement, despite a jump in borrowing costs for the Government.
The Treasury said reforms will aim to 'get the balance right between cash and equities to earn better returns for savers and boost the culture of retail investment.'