Percentage of income is Labour's rather weak response to the economic facts. The richest small percentage of our population pay vastly more in actual terms than the far larger poorest percentage. It's an embarrassing fact for the left so they muddy the waters by saying that the poorest pay a higher percentage of their income. You would have to be numerically challenged to not realise that the larger part of our income tax take comes from our richest residents and if you frighten them off we will all be seriously poorer.