I tend to agree but it's easier said than done unfortunately. You could abolish self-voting but then you'll just get sock puppet accounts circle-jerking each other. That is "next level" abuse that is also going on and harder to detect. Same with upvote bots. Payment for upvotes can be taken off-chain and not visible so detection becomes harder. I like your idea about comment rewards. That's an interesting one that might work to some degree.