It's being done. It won't be enough.
The real fly in the soup is stake-weighting, which will precipitate profiteering without fail. Even on Steemit v.2 that @dan is building. Given his sentiments, I expect stake-weighting to feature on his new platform.
Before there were bots, there was circle-jerking, and self-votes. Actually, there have always been bots, but it's a veritable infestation now. Much worse than before.
Dealing with stake-weighting may solve the bot problem.
A cure worse than the disease, according to some. I disagree, but I'm not very avaricious.