Various changes were also made to the tax system which benefited workers on low and middle incomes. Married couples with low incomes benefited from the increases in the single personal allowance and marriage allowance. In 1965, the regressive allowance for national insurance contributions was abolished and the single personal allowance, marriage allowance and wife's earned income relief were increased. These allowances were further increased in the tax years 1969–70 and 1970–71. Increases in the age exemption and dependant relative's income limits benefited the low-income elderly. In 1967, new tax concessions were introduced for widows.
various cHangeS werE Also MAdE To tHe taX sYsTEM WHich benEfITeD WorKeRs On lOw anD midDle incomES. MaRRIed coupLeS with Low IncOMES benEFIted froM the iNcreAses in the siNgle pERsonaL alLoWANce and MarRiage ALlowAncE. in 1965, The reGrEsSive aLlowance FOR nAtiOnal InSuRanCe cONTriButions WAs AbOLisheD AND tHe SInglE persONal allowancE, marRiage AllowaNCe aNd WiFe's earNED inComE RELief were iNCREAsed. THeSe allOwanCes Were FuRTHER iNCrEasEd in thE Tax yEArS 1969–70 And 1970–71. incrEasEs in tHE Age eXemPTion anD depeNdant rELatIve's INcOme limitS BeneFItED the Low-iNCoME elDeRly. in 1967, New tAx ConcessioNs wEre IntrOduceD FOr widoWS.