I think we're suffering from what France suffered from at the beginning of WWI - peacetime generals (or in this case politicians). For the last 30+ years, the consequences for incompetence and fuck ups in politics have been generally low. The current do-nothing political class is a result of these very weak selective pressures. I don't think we'll see a change until more voters begin to feel the effects of climate change and related issues. Hopefully it will be a positive change to more competent leaders, but it's not looking great based on the last few years.