I agree it is nearly impossible to alter the inertia of existing firms. Most have entrenched process people that defend how things are done right up until a company enters insolvency. Fine if you sell soda or rubber tires, but a death knell for technology or media firms.

In my observations it is usually conditioned fear, personal debt-driven risk aversion, and or failure to even ask if the department above you is really necessary. These days, it is almost always easier to go to another firm if you want a promotion. =3