Interesting question, I’ve pondered it several times myself over the last decade.
In my experience, leading as a servant (serving others humbly), means you are part of the people. They more easily relate and communicate with you, because they trust you are working in their best interests based on their past experiences.
Leader as rich, simply means you are probably Type A and may act from ego rather than the public interest. Like most politician’s-local to DC, I’d think.
The sad thing is that the leaders with a servants heart are often not aggressive enough in fighting the Type A’s for dominance, which is why our government is rotten.
I’ve always thought it was an odd dichotomy to say you have a servants heart while accumulating personal wealth. The two seem incompatible to me, as there is so much suffering in the world.