That's pretty much my feeling too. Still, it's the first time I read about this behavior. It's nice that someone bribes you in a public memo. 

Also anyone could just post 10 comments or post and upvote them all and would get 100% not 50% of their votes.

I agree, the more time you spend here the more evident it becomes that quality tends to win out over this type of behavior.

I never felt that way. Rape, theft and murder are also inevitable, but I would never say - "we just have to live with it." It sounds too much as resignation :)  Corruption is wrong and like all other crimes it has to be addressed and fought. In my opinion corruption is only second to war in destroying human communities.

As for quality - Steemit is one of many experiments on the internet trying to make a systemic way of promoting quality, but I am definitely not sure it works perfect in its current form...