Imam Ali proved politics and ethics can go together
The political behavior of the Commander of the Faithful (a.s.) was not separate from his spiritual and moral behavior. The politics of the Commander of the Faithful (a.s.) interrelated with his spirituality and morality. In fact, his politics originated from his spirituality and morality.
If one's politics originate from morality and feed from spirituality, then it will be a tool for the people who are faced with it, to achieve perfection and paradise. But if politics become separate from morality and spirituality, then it will be demagoguery. It will be a tool for gaining power at any price, for accumulating wealth and for furthering one's own interests. This kind of politics is like a pest.