Hong Kong has a semi flat income tax with three brackets and very few deductions. You can do all your taxes on 1/2 a sheet of paper regardless if you a waitress in a restaurant or wealthy tycoon.
We actually paid more in taxes there than here but minded it less because system was so easy. You did not need an accountant or bookkeeper.
I’d rather have a sales tax and get rid of this annual tax filing we have to do.