That's not how it works in larger companies with an org chart. If you want some random person on another team (under different manager) to do something, you go through their manager, even directors and VPs will CC your manager, because it's the polite and proper thing to do. Everyone's already working 100% workload, they don't need stuff coming in through the side door. Fats think it's no big deal, because they're not pulling their weight and slacking off to begin with, so they think everyone else is just like them sitting on their hands waiting  for something to do.