Besides, I don't want to be connected again to someone I ranked negatively once (even if other people gave them 5 stars). I don't think such blacklisting - even in mild form, eg. with some sort of expiration period - is implemented. [EDIT: apparently it is, although the app never explicitly states that].
This is to say that inflation isn't the only, or even main inefficiency of Uber's system; from my perspective.