"Mr. Bannon a few years ago identified Mr. Trump as his Manchurian Candidate and ingratiated himself to him by stroking his ego." 
Bannon  claimed in an interview that Trump probably doesn't understand what's going on, but he's a useful tool to create the chaos that Bannon wants. 
Anyone who believes he intends to make a better America is totally naive. His goal is to destroy America, and he makes no bones about it.