If government were the personal property of some men, they would have no reason to engage in corruption, and very good reasons to avoid it. So there would be less corruption, and a truer focus on policies that really worked for the benefit of the people (ergo, on tradition). For, good policy engenders prosperity, and prosperity generates lots of revenues for the sovereign. Where the sovereign can profit honestly and honorably from wise government, there will tend to be wise government. The net present value to the sovereign of the income from the golden goose far outweighs the value of the slaughtered goose.
In practice, government is always owned. It’s just that such ownership is usually illicit, therefore informal and sub rosa, and the sovereign’s personal profit from the activities of government ostensibly abhorred; so that the sovereign cannot be seen to be profiting from the operations of government, and must therefore profit from them (as he certainly will) by corrupt, obscure means.
Better to have it all out in the open, and straightforward, and honest, as when we had kings.