Welfare warning

Though this assertion will alarm many, the purpose of the benefit shake-up is to reduce welfare dependency and such changes will, inevitably, produce winners and losers. A long-term perspective is required.

The challenge, as always, is ensuring that work pays and that current claimants are not worse off if they do find employment. To his credit, Iain Duncan Smith, the Work and Pensions Secretary, recognises this.

But, while Mr Cameron is becoming increasingly adept at brushing aside his critics with contempt, he would be advised to note the IFS's caution. He repeatedly quoted this think-tank's research when in opposition. And its former director, Robert Chote, was last year recruited to head the coalition's Office of Budget Responsibility. The onus, therefore, is on the Government implementing these changes – necessary ones – in a fair manner and it should, therefore, accept the spirit of the IFS's warning.