In Poland the social security taxes are 22%, then 14% for the employee, plus income tax and 23% sales tax.
This is why the French are protesting. Very little money ends up in the hands of the worker.
Social security taxes are pernicious and should be replaced completely with income taxes. It should be clear to employees how much tax they are paying, and it should be as simple as possible for employers to pay employees.
Drivers are a minority of the population, whose choices cause immense harm to everyone else. Their getting steamrolled by national policy seems completely reasonable. Their attempt to hold the rest of the country hostage does not.
[0] https://en.m.wikipedia.org/wiki/List_of_countries_by_vehicle...
[1] https://www.citylab.com/transportation/2018/01/the-automotiv...