The Institute for Fiscal Studies

Tax Research UK does some digging:

But the real question is this: is this thinktank really free of bias? Can it be, when it suggests abolishing tax on all corporate profits, on interest, on wealth and on half of all dividends (as is likely) whilst at the same time suggesting VAT be charged on all food and promoting a massive increase in VAT in general, when that tax is known to be heavily regressive, whilst also proposing tax cuts that would deny the government the revenue to compensate the losers from these changes? I don’t think so.