[lotsofpulp]

> When Diogenes asks Alexander to move aside, it demonstrates the limits of this power, and therefore Alexander's virtue as a ruler: someone who doesn't want anything gets exactly as much benefit from this king as from anyone else.

This seems like a trivial fact to me, or I am missing what is notable about this “virtue”.

> If the only thing Alexander can contribute is threats, that would simply make him unvirtuous - and equivalent in power to any armed madman.

I guess so in this specific interaction, but it would be ridiculous to say a person that commands armies is equivalent in power to any armed madman in the big picture. My responses are in the context of societies using money as a tool to incentivize people, to which I am not aware of there being a better known alternative.