If there was a flat 10% income tax rate (or even 20%) that everyone paid honestly, I’m certain there would be far more money coming in than at present!
If they bought in a flat rate of 20% most people would declare their incomes and not mess around. Probably a lot of people abroad would pay their taxes here and I'm sure the revenue it would bring in would be much higher. However people who earn more according to the majority must be taxed a higher % as they have a moral obligation to do so and help the poor, it is the unwritten law of this country.....