He accused the Chancellor of “kicking them in the teeth” after he announced self-employed workers paying the main rate of class 4 National Insurance contributions will see an increase by 1 per cent to 10 per cent in April 2018.
An 11 per cent increase in April 2019 will follow, altogether raising £145million a year by 2021/22 at an average cost of 60p a week to those affected.
“The self-employed had been seen as the great success story of the level of employment in this country, now you’re kicking them in the teeth,” Boulton told Jane Ellison on Sky News.
The MP defended Mr Hammond’s budget during the tense exchange.
Adam Boulton ripped into Jane Ellison over the Wednesday's spring budget
The self-employed had been seen as the great success story of the level of employment in this country, now you’re kicking them in the teeth
“No not at all,” she replied. “You’re right that they are a success story and we’re absolutely backing our self-employed people, our business people, sole traders, our entrepreneurs.
“But the reality is that the gap in Class Four NICs [National Insurance contributions] has traditionally been associated with a quite big differential in what people got in contributory benefits.
“That’s what National Insurance goes towards – that gap has substantially closed.”
However, Boulton hit back and accused the Tories of “balancing the books” to the detriment of the taxpayer.
Find out what the BUDGET means for YOU Wed, March 8, 2017
Budget 2017: Philip Hammond hailed Britain’s booming Brexit economy today as he delivered his first Budget of the year
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Mr Hammond says he is 'building the foundations of a stronger, fairer, more global Britain'
Ms Ellison said the budget was about the tax system "keeping pace"
“The reality is if you look over the period that this budget covers, it is actually a net tax increase, I mean you’re balancing the books off the back of the taxpayers,” he said.
Ms Ellison said it was about ensuring the tax system “keeps pace”.
She said: “There are two things going on at the moment if you look at two big trends that the Chancellor addressed today.
“One is the long-term sustainability of key public services and you saw a huge announcement today about an injection of £2billion into social care.
“But alongside that, we’ve got to make sure the tax system keeps pace.”