There's several taxes. The tax he talks about is what you pay based on your revenues (with several ties, like in the uk). In france we receive what we call a 'salaire brut' which is a salary on which the employer already payed some taxes (which are quite high if i'm not mistaken). On this 'salaire brut' some taxes are automaticaly taken (including some for healthcare), then you obtain what we call 'salaire net', which the money that you get into your account. On this 'salaire net' you still have to pay income taxes (the next year for the previous for the moment, it my change to be taken immediatly on your salary, like in the uk).
I don't know, altogether how much taxes we pay. It varies depending your salary, your job or location (farmers have a different healthcare for exemple). Including everything, If i remember well, an employee cost twice his salary to the employer. A salaire net is something like 2/3 of the salaire brut. Income taxes depends of your income. In comparison with european countries, I think that it's mainly the employer part of taxes that are high.