"We want kids to have tangible proof that they are respected and valued in the body they have now, " she says.

BBC: Georgia obesity campaign sparks fierce online reaction

The problem lies in creating a solution less flawed and distrusted than private-sector bonuses, which are often divorced from tangible proof of rising performance.

ECONOMIST: Public-sector pay

"Although there is no tangible proof, I believe that, due to the significant reduction in knife crime for the last festive period, lives will have been saved, " he said.

BBC: Man in a hoodie holding a knife

At HP, we are already seeing tangible proof that the steps we have taken are working, but we have much more to do on the multi-year journey ahead of us.

FORBES: HP's Whitman, In LinkedIn Post, Says Turnaround Is Working

To maintain international prestige, to deter invasion, or for some other half-baked reason, he may have wanted the world to believe he retained a capacity to inflict massive destruction, while at the same time hoping that international sanctions against Iraq might be lifted if there were no tangible proof of his arsenal.

ECONOMIST: David Kay and Iraq's WMD