pure parasitism, n.All

Pure parasitism (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠rare because it rots its own ground: it drags the group it feeds on down to an organization too low to feed it.