I used to wonder this myself. The answer I come up with is that companies have a check that they can cash pending execution of a series of finite steps. In a

I used to wonder this myself. The answer I come up with is that companies have a check that they can cash pending execution of a series of finite steps. In a reasonable mature enterprise these steps are defined and one needs a person to execute a subset of these steps. An idea introduces a probabilistic component to this that the person in charge of hiring has not considered because he/she has no incentive to do so. He/she will definitely receive negative feedback if the series of finite steps to the money they are in charge of is not properly executed. In short, no reward and definite risk is bad for a company drone, in general. No straight path to money != good.