An alien civilisation has developed a political system around the idea that governance is essentially a form of corruption and to lose sight of that is to invite disaster. For instance in the absence of guard patrols a trade route is going to become the site of banditry because individuals are inherently opportunistic and self-interested. The largest band of bandits are going to consolidate control over their source of income thereby becoming a criminal organisation with control over that territory. As an organisation they will establish a set of rules to prevent exploitation of their income source, rather than individual bandits attacking travellers along the route randomly a toll is established and travellers are charged a set rate for use of the organisation’s road.
Now that the organisation effectively owns the road and are making a regular income from it they may consider investing in it, laying cobblestones and setting up signage, to both further legitimize their ownership of it and encourage more people to use it, indeed it’s in their best interests to pay for the maintenance of this infrastructure. So now that these “bandits” are patrolling the road, wearing uniforms, assisting travellers (it’s in their best interests to do so) and fighting off others who want to perform actual banditry, are those employed by the organisation still bandits themselves or would it be more apt to call them guards?
As this alien civilisation sees it governance is good corruption, like how yeast is the good kind of bacteria for making beer, whereas bad corruption takes the form of exploitation and most often occurs when an organisation in control of a territory or service but refuses to take responsibility for owning it. So my question is what kind of political system would this alien civilisation use in order to ensure the best interests of the government organisation and the people working for it align with the best interests of the nation/kingdom/whatever the aliens live in, so that their inherently corrupt nature works for rather than against them?