Short form:
ICANN's board members (past and present) has repeatedly demonstrated that they're only interested in lining their own pockets.
The alternate grouping have repeatedly demonstrated that they're not only interested in lining their own pockets, but also to be able to use the Internet as a political weapon.
If the US govt wasn't so dead set on NOT retaining IANA, the best course of action would be for it to remain where it is.