When a democratic organisation wants to grow in headcount there is always a chance that it won't remain democratic anymore.
The ratio of decision makers to decision followers is going to drop drastically. A simple arithmetic would tell you that it is not going to be a democratic system anymore.
The driving forces which were making clear decisions based on the direct feedbacks from the sensory organs, would start relying on statistics and second hand feedbacks.
A group of close circle ministers might start cropping up and the nervous leader(s) might suddenly start listening to all sorts of gossips. The same gossips which were mere entertainments earlier would become instrumental in decision making. The jokes wont remain jokes any more. After all you have got to be very careful while running a growing organisation!