A note for people not familiar with the UK: £60,000 per year is about twice the median pay for a full-time worker, so the definition of 'middle class' used here (at least in the headline) is pretty tendentious.

Also, the "Tax Payers Alliance" is an opaquely-financed group with zero membership, which has existed for decades for the sole purpose of getting cited as a 'low tax pressure group' when newspapers feel the need to get 'the other point of view' for some story. Being an astroturf group obviously doesn't make it wrong in any given case, but it has neither a reputation for honesty, nor for actually being anti-tax (it's very loud about taxes mostly paid by the rich; much more quiet about VAT for example).