Whether his TA is right or wrong really has no bearing on this argument. he could be making everyone millions of dollars and still not deserve 3% of the reward pool that belongs to all of us. The reward pool is finite, and split each day based on the voting of the day.

If you would like to understand more about how his getting $400 per post on 10 posts a day is bad for you in terms of the rewards you receive check out my post The Reward Pool for Dummies in which I compare the reward pool to Bid Bots in an effort to make it easily digestible and understand.