The EU as a political construction is in a state of terminal decay. We know this for one reason and one reason alone: its core principle is the state is superior to its people. A system of government can only work over the longer term if it recognises that it is the servant of the people, not its master. It matters not what electoral system is in place, so long as this principle is adhered to.
https://www.goldmoney.com/research/goldmoney-insights/the-gently-rotting-debt-ridden-eu