נִתַּ֣ן הַסֶּ֔כֶל בַּמְּרוֹמִ֖ים רַבִּ֑ים וַעֲשִׁירִ֖ים בַּשֵּׁ֥פֶל יֵשֵֽׁבוּ׃
la folie est appelée à de hautes situations, et des gens considérables demeurent dans un rang inférieur.
Rashbam
תבן אין נתם, again we encounter this construction with the vowel kametz, making the word a past participle of the passive, i.e. “available.” The same word in Kohelet 10,6 in the line נתן הסכל במרומים, spelled with the vowel patach under the letter ת, is in a passive mode of the verb נתן, meaning “folly has been placed on lofty heights.”