How flexible are political principles? Democracy is the overall and greatest of principles, except when a one-party totalitarian system is capable of “turning on a dime” to reduce carbon emissions. 

First-past-the-post is a valid principle practically everywhere, but it is invalid it helps a right-of centre political party. If it benefits a left-of-centre political party, then it is valid, legitimate, well-founded and defensible.

And then politicians ask themselves why in every election between 4 and 5 voters could care less and stay home. It’s revolting.