Programming and managing are completely different jobs that accomplish different things for the organisation, but they are typically arranged in a top-down fashion, the manager has power over the programmer. A manager's job is to do the function of interacting with the wider organisation in order to determine the best way for the programmer to spend his time, in effect it's a research job, then he presents the programmer with the results of his research and they both agree that the most value can be added to the organisation by working on bug X today instead of feature Y. But what actually happens is the manager says "do this, because I said so, and if you don't I'll block your next raise". Or so-called engineering managers cherry-pick the most rewarding work for themselves and assign the unfulfilling work to subordinates as punishment. That's deeply dysfunctional but it's what happens when you have a group who wants to do real work, and another group who has plenty of time on their hands for full-time politicking.