Jeremy Hunt is making more cancer patients wait for urgent treatment.
Labour leadership challenger Owen Smith revealed figures showing 76,000 patients have been kept on waiting lists for two months or more since Mr Hunt became Health Secretary in 2012.
Government targets say 85 per cent should be treated within 62 days of an urgent referral from a GP.
But Mr Hunt began missing those targets within a year of taking up office.
Mr Smith said: “These figures are the clearest sign yet how badly patients are being failed by Jeremy Hunt.
“On his watch tens of thousands have experienced traumatic delays because of his failed policies and cuts to frontline services.”
Mr Smith said he would boost NHS spending by four per cent every year if he became PM.
He would do it with a wealth tax on the top one per cent of income earners to raise £3 billion a year.
His plan is to charge those earning £150,000 a year 15 per cent on unearned income from investments.
Mr Smith has also vowed to reinstate the 50p top rate of income tax and reverse cuts to capital gains and inheritance tax.
He would abolish the Department of Work and Pensions he shadowed before quitting Jeremy Corbyn ’s shadow Cabinet.
That would be replaced by two new Whitehall departments – a Ministry of Labour and a Department for Social Security.