Originally Posted by Dodens Grav
You falsely assume that referees have no accountability for their performance just because they don't get "fines" and "suspensions".
Well, to be fair, the accountability of the refs is different than the accountability of the players.
They are not full time employees. Many of them own their own businesses, or are successful in other jobs. Being an NFL ref is a side project for most of them. The consequences of not being a consistent or good ref are either reffing less games (or less important games), getting a smaller salary, or not being a ref any more. It's not directly tied to their main livelyhood though (like an NBA or NHL ref is). Therefore, I feel they don't care as much about "getting it right".