rigorous, factual and informative

The objectives of this book are:
1 / Make an inventory of our tax system
2 / Suggest a fairer system (progressive) for very high incomes / assets are taxed less than popular or wealthy classes!
3 / Open rigorous debate on tax policy

I found the book very factual and rigorous and specific examples it shows the ineffectiveness of our policies.
For example, we are taxed on average at 49% (yes it's amazing) Accordingly, the tax shield of limiting income tax to 50% is really nonsense.
This changes baseless articles ...

No matter that one is left or right, the book forces us to think and challenge candidates on their proposals.
I also learned of the fiscal and economic concepts (the difference between gross national income and GDP CSG / RDS, marginal tranche)