Andy Burnham pledges ‘cost £63bn’ – and tax ideas could backfireBurnham's pledges could cost the government £63bn. PA WireA series of tax cuts and spending pledges proposed by Andy Burnham and John Healey could cost the government up to £63bn by 2030, new analysis has shown. Capital gains tax plan could cost another £7bnThe report by Capital Economics also cast doubt on revenue-raising measures floated by Burnham and other senior Labour figures. There is likely a ceiling of £15bn extra borrowing for investment, she said. Long-term gilt yields, which translate into UK government borrowing costs, briefly hit a century-high and have remained elevated over the last four months.