Earlier quoted context omitted.
And btw there is a very good reason for those tiered systems. Imagine people making 26k and paying 14%. They end up with 22,360. If they get a 5k pay rise they make 31k, pay 30% and end up with 21,700. Would they want that raise? No thanks, but a system preventing some pay raises would be insane.
That's not how it works. You pay nothing on the first 9700€ You pay 14% on the money you make above that, that is 14% of ~17k€ You then pay 30% on the money above that , that is 30% of the extra 5k.
My example was for a system that doesn't work in that way but switches from 14% to 30% for all the income, and not only for the amount above the threshold.
Maybe I should have worded it better but I take the downvotes I got as a demonstration of my point, that it would be insane.