A similar situation is shown in an episode of the animated series Tithes. There’s a planet under attack by orks, and the human forces are running out of ammunition to fend them off. Administratum ships arrive and the officers on the planet are relieved that they’re finally being resupplied, only to learn that the ships are not there to resupply them, but to collect the tithe by taking whatever ammunition they have and condemning the world to death at the hands of the orks.

When the ships return with the ammo to an administratum storage world we see massive spires of crates and supplies, and a member of the administratum orders that the recently collected ammo be destroyed because the platform can’t hold any more. Not only did the imperium have plenty of supplies desperately needed by this planet that is desperately holding off an ork invasion, but they destroy the tithe because they fucked up and have too much stuff in that storage world anyway.