We don't have to fight for stupid, murderous wars. The government provides that willingly. And so this position, this 'left and right thing' goes on and on. Maybe because government is essentially a bad thing. Yet there is no way to run a society without a government.
Some people believe that a degree of corruption and ineptitude in government is inevitable.
These things are rooted in human nature. I once asked a very smart doctor why so many heart attacks occur when men are shoveling snow. He gave me an interesting answer. He thinks that in our evolutionary development this particular motion was never required, so we never developed the facility to do it well and that may be the answer to your question. The government of one by another is something people do badly.