So can you confirm that specifically:

a) There is no list of accounts that is protected from scrutiny?

b) There is no group of accounts that is watched very closely for violation of terms?

c) That bans happen almost always shortly before a payout would be due?

The description of the latest known policy in place reads as it is carefully tweaked to be defensible even in a court of law, so even if the "leak" is true, I am not sure if a class action lawsuit has a chance.

To skew the outcome in Google's favour is basically guaranteed if bonuses and goals drive the team members to interpret the procedures in a way that a impartial observer might interpret as unfair.

(using a throwaway account for whistle blowing does make sense, and not necessarily reduces credibility)