a) We’re already halfway there:
b) It would be a refreshing change from the status quo where America fulfils that role. Australian foreign policy is largely written in Washington, while the Australian news media is dominated by Murdoch and heavily biased to his political ends. Australian domestic policy also gets the treatment when it draws attention.
Having more powerful countries fuck with your politics is a thing that happens to less powerful countries. It’s routine.
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Looking at it from the other direction:
Suppose there was a Russian election between one candidate who was militantly anti-American and another who was not. Suppose that US intelligence had gotten their hands upon some true information that would make the anti-American candidate look bad.
Would you be surprised if US intelligence saw to it that this information was leaked to the press?