Reddit mods are causally picked by the users. If they don't tow the users' line you're looking at even more drama (there has already been tons of mod drama in the past). The slightest hint of power hungering is enough to set off a wildfire across the site, so anyone that is lining up is probably unqualified to begin with.

The current set of volunteer mods are by far Reddit's largest asset - especially on the major subs.