The root cause is complexity. People don't understand their jobs: sometimes they are told to do stupid things, other times they do useful things but they think they are useless. Companies always relied on their employees to adjust their work to the overall goal - if they cannot understand the whole structure then this crucial organizational maintenance fails. If they see that their reports are not read - then they or their bosses should intervene - but now people don't understand what is the purpose of those reports, who should read them and why.

Another thing is that in a complex organization there are many internal zero-sum mini-games - bosses that employ people only to increase their own importance, etc - then the job of these employees must be kind of useless. But the root cause of that is the same - it is the job of the boss of the boss (or maybe the CEO, or the board or the owner) to reduce that, but they don't because the complexity hides it. And then those mini-games add to the complexity itself creating a positive feedback loop.

Jobs like lobbyists or corporate lawyers or much of PR departments are also about zero-sum games - but in a bigger organization - the nation as a whole. Military is a zero-sum game on yet bigger scale.