That only works the way you think it works if most people agree with you. I doubt that... Plus it's really hard to determine who is actually a 10x contributor, even more so universally (across projects, teams, companies).
It's really not that hard to see, on a single team, who's contributing twice as much as who else. You don't even have to be a manager - sometimes managers are the last to be sure, actually. Generally people who complain about lazy coworkers end up settling on a lot of the same people... Being a manager just gives you official venues like feedback requests to realize "oh everyone else sees it too."
