Think what the Government could do with all this information. It has been suggested that council tax bills will be adjusted to take account of social background, so that the middle classes pay more. Data sharing will allow this to happen. As Jill Kirby, at the Centre for Policy Studies, who is producing a pamphlet on the subject, observed: 'It is not hard to conceive of a state which makes value judgments about an individual's suitability to benefit from certain services, and which allocates those services on the basis of a set of criteria (such as income, educational background or lifestyle) of which the individual may be unaware.'