Of interest is section 11's withholding clause, which states that the withholding is "pending Google's reasonable investigation". I don't know why it's there, if Google can terminate at its sole discretion at any time (which is can, according to Section 6). I think it's there to throw some legal chaff in the air and make it _seem_ like there's some protection, so the agreement isn't entirely one-sided. Section 11 (which provides a vague promise of investigation) does NOT survive termination of the agreement, according to section 6. So termination means the investigation is over, and means it never actually has to take place.
A fair agreement might require Google to return, to advertisers, confiscated funds. A fair agreement might also create a "suspended" state for an account, preventing termination until the results of a "reasonable investigation" are available.
Of course, IANAL. I am just reading what is there, which is what most of us have to do. Looks to me that Google can confiscate any funds it wishes, then terminate.