Not only is Foucault wordy, he's in translation from French--where we like to have dozens of clauses in each sentence. Seriously. In his "Madness and civilisation book" there are lots of pages where the entire page is only two or three sentences and that's perfectly correct and normal.

ETA: I had an English teacher tell me once that there is never reason to have more than two clauses in an English sentence. BUT IT'S SO HARD.