You are so very wrong, it's laughable.

If the employer wouldn't pay it, he would give it to me. So, even if he is the one actually transferring the patronale bijdragen from his bank account to the governments bank account, I am the one paying them. (To be completely correct: a tax incidence is paid by the one who is inelastic, in the case of wages in our country with lots of employment opportunities, this is mainly the employer).

You are exactly falling the governments trap: they split the personal income tax in different portions, giving them different innocent names (and even hide a large portion from your view on your loonstrookje), so that people are not aware how much they are really paying.

And why do you keep forgetting the 13.07% RSZ that the employee pays himself?