You have to be special kind of retard to think that US/China/Russia who historically couldn't cooperate on anything (Snowden, Huawei etc..), all of the sudden will start cooperating on blocking transaction for tax purposes?
US, China, Russia are all FATF Members:
https://en.wikipedia.org/wiki/Financial_Action_Task_Force_on_Money_LaunderingSo they do cooperate of some financial matters.