The thing is that is not how taxes work, I cant be too sure about France though. Usually the increase in the tax bracket only applies to money earned in that bracket.
Yes I understand. Not sure of how it work for them, but I've read about this side effect multiple times. I'll try to find these stories.The thing is that you have a tax for everything in France. This is very VERY complex, more complex than most European countries.
That I can understand. The system itself can always be debated. As a Canadian I am use to everything being taxed. It can be a tricky system to get right.