Ok but that kind of proves my point. They are avoiding taxes and using loopholes and tax havens precisely because it is unfair that their tax rate is increasing

Ok but that kind of proves my point. They are avoiding taxes and using loopholes and tax havens precisely because it is unfair that their tax rate is increasing the more they earn. At least they feel it’s unfair to them. Why not solve the problem by having a simple flat tax? Everybody pays the same amount, let’s say 20%. Then it becomes much easier to come after tax dodgers on moral grounds. They no longer have an excuse of them being unfairly treated as their tax is identical to everybody else.