Even if Wang Wei doesn't know specifically what happened inside the private room of grand elders.
He can guess roughly what's happened inside the room. When you get benefits without really working for them you have to pay them in another way.
Just because you got it without doing anything doesn't mean you don't pay anything.
You may have to pay it with something invisible like individuality, self-respect and identity. These are some of the things you may lose for free meagre benefits without knowing.
Just like some lazy people who look for a way to leach others without doing anything worthwhile.
You may think you don't lose anything. But you will lose things like individuality. You have to follow the rules of the ones that provide for you.
Otherwise, they will not provide you. So with no other choice, you will obey them unconditionally and do everything to your master's need.
