So let me add three further things. First, despite what Jolyon says I do believe a) the tax gap is £120 billion and b) £20 billion is collectable.
Whether you call it a tax gap or not, collecting it is still a tax rise of £20 billion (or as Corbyn has it, £120 billion).
It’s still that amount of money flowing out of the pockets of the populace and into the things that Ritchie and Jezz desire to spend upon.
It’s still a tax rise.