Dogsbodies
Methinks the point of code owners isn't so much to grant power as responsibility.
In the absence of an owner, bug reports and such things can languish unloved as noone takes responsibility. Especially the kind of report that takes time and effort to distinguish from luser error. Whereas if I specifically own a component, I'll step up to those issues. And - conversely - spend less of my time dithering over someone else's issues, unless I have a very clear interest.