Every single thread on taxation has numerous posters gleefully asserting that they would be delighted to pay more tax. Why on earth doesn't Rachael Reeves publicise the fact that anyone can volunteer to pay more tax if they are that way inclined and that there are already mechanisms to do this? You could even give everyone that donates additional tax a little sticker or certificate so that they can prove they're morally superior to the rest of us and just how much of a better citizen they are.
I would expect to raise at least a few billion from this if everyone put their money where their mouth is and the donors would be in a far better position to preach about the virtues of high taxation if they could prove that they were actually walking the walk.
AIBU?