The old chestnut: A week is a long time in politics certainly applies to the events of the past week here in Australia.
I just came across this one from Ernest Benn:
Politics is the art of looking for trouble, finding it whether it exists or not, diagnosing it incorrectly, and applying the wrong remedy.
Australian Independents Movement for Political Integrity 
Another from Thomas Jefferson on the US democracy:
In America we do not have government by the majority. We have government by the majority who participate.
The final stage of a government occurs when it’s purpose becomes, to
protect itself from those it was created to protect. -David Gray