He's crazy stupid. From yesterday's Meet the Press:
CAIN: There is a huge amount of public support for 999. Just talk to anybody. This is what’s going to help us get it passed. The public support.
GREGORY: I just want to break that down. So you’re acknowledging this morning, which I haven’t heard you do before, that there are individuals who are going to pay more in taxes.
CAIN: There are some, yes.
GREGORY: And you think those people are going to rally around tax reform where the wealthy pay less and middle-class and lower-income folks pay more.
CAIN: Yes.
There you go. Cain admitted that middle and lower class Americans will receive a tax increase while the rich get a tax cut. And guess what? Middle class Republicans will still vote for him while declaring that 999 is kickass. Smart.