By Dave Burke Jeremy Hunt has quickly backtracked on his vow to scrap National Insurance altogether after he was accused of acting like Liz Truss. The Chancellor suggested he wanted to get rid of the levy after he announced he was cutting it by 2p in the Budget. In an email to Conservative Party supporters on Wednesday evening he said he would “make progress towards that goal” within five years. But critics accused him of acting like the ex-PM by floating massive unfunded tax cuts. Labour said the £46billion-a-year cost would be even bigger than the cuts announced in Ms Truss’s disastrous mini…