As more people join the steem platform, more people buy steem. Thus the value of steem goes up. While Haejin may get a significant portion of the reward pool, he is also helping it get bigger. Exposure to the platform is good exposure no matter what.
This problem of reward pool abuse will not be fixed by whales, especially not bernie. It will be fixed by dan and ned, if they have the cojones to come up with and implement a solution.