The key is being able to throw the bums out every 4-8 years. This gives Democracy a self-correcting feature that doesn't work with lifetime rulers.
I feel like there's a limit to how much corporations can influence voters, the same way there's a limit to how much moviegoers will keep paying to see the same corporate movie over and over.
How do you think AI would legislate, if AI legislation would become reality?
Somewhat better than a lifetime ruler, but this is far from what Democracy are on the textbook.