The problem is that a single whale can have the power of 10000 votes.
The world is already going crazy with left vs right, race suddenly being an "issue" again.
We've already got SJW bully campaigns to literally get people fired from their jobs.
Any opinion you don't like can be flagged in the same way as an opinion you do like can be upvoted.
Granted, it's still a better alternative than what we have now but it doesn't exactly solve the problem. :/