If you just read the verses in Melachim Bet, Gechazi seems to faithfully serve his boss Elisha a few times, then he gets greedy and makes a couple of bucks off of the venture, at which point Elisha immediately realizes it and punishes him.
Chazal, however, indicate that Gechazi was rotten much earlier -- he touched the Shunamite woman inappropriately, and told everyone he was going to revive the dead when his instructions were "talk to no one at all."
So either Gechazi is doing all these wrong things and Elisha doesn't react ... or he's unaware.
By that logic, the Midrash is reducing Elisha's prophetic awareness. What lesson should we draw from that?