6 lines against 20! In Germany, the gross salary is taxed by only few contributions (tax on salaries, solidarity, pension fee, Church). It was understood that flexibility is much more efficient with a fiscal and regulatory simplification.
In France, it is the exact opposite. The French pay slip is full of unreadable information related to taxes, deductions, tax credits, contributions, fees, compensations, etc. Thus, the pay slip is hard to understand. And as a matter of fact, French workers hardly know how much they really get.
To know about the differences between Germany and France, please read the IREF article "France - Allemagne : les différences économiques"