Perhaps the people who run the place want it this way.
If you have some clout in this shul, than here is what I would advise.
Before Maariv at the end of Shabbos, take all the Seforim that are around – especially siddurim – that were not put back and stack them all in an out of the way corner. It will be frustrating for them, and an easier clean up for you.
Keep it up for a month, if nothing changes switch to before Mincha and stack the Bimah to the ceiling.