Resonance

I wonder why so many organisations at the moment seem discordant, out of tune and incoherent? 

How do organisations that start with a clear message, close teams, and solid internal and external relationships find their way to bickering, blaming, and bullying to achieve their ends? 

Conventional wisdom points towards leadership, purpose, engagement, and other areas that can conveniently provide consulting opportunities, but I wonder if these are just symptoms of something more fundamental - size?