41.   The effect of the income tax system on the budget constraint that individuals face depends on the precise nature of the tax system.

42.   Progressive tax systems usually involve higher marginal tax rates for higher earnings.

43.   With respect to the effects of the overall tax system at each income level, Dilnot, Kay and Morris provide an insight.

44.   The authors introduce a methodology for describing a whole tax system that is useful here as a summary device.

45.   The favourable treatment of mortgages, pensions and life insurance in the UK tax system has not gone without comment.

46.   Radical cuts to income tax plus large increases in national insurance and indirect taxation have made the tax system far more regressive.

47.   A proposal to restructure the transport tax system in favour of the environment is under discussion by the European parliament.

48.   He pointed out how the existing tax system had evolved so as to encourage the unfettered growth of car ownership and the transport of freight by lorry.

49.   The tax system is generally concerned with persons.

50.   Mr Brown argued for changes to the tax system so that it assisted people who undertook training, and for new incentives for companies which upgraded staff skills.