If someone is paying writers to write post that's fine, it just means Steem is paying too much for particular type of content

Pretty much this. The solution is more competition among content. If you think what is being posted is garbage, and doesn't deserve its rewards, then post something better. The entire pool is going to be paid out regardless. Without bringing new content, this is just a food fight between bloggers over who can get the most (or a smear campaign).