Advocates of a company tax cut appear to have a genuine inability to grasp an epistemological basic: actual real-world evidence differs from speculation, however expert. Today's Australian -- which editorialised in favour of company tax cuts (bearing in mind the company that owns the paper, News Corp, has structured its affairs in order to pay no tax in Australia) -- has persisted with the bizarre idea that modelling of the benefits of a corporate tax cut proves that such benefits are real.

To back up its argument, it ran a piece by Canberra economist Chris Murphy in which he argued that modelling undertaken by his company, Independent Economics, proved there was "a consumer benefit to budget cost ratio of 2.39 from the proposed company tax cut".