After reading some of the other comments and replies I figured I would add something in here which seems to be missed which is daily reward pool. Steemit does not run on a potentially infinite well of SP (exact opposite with a maximum of 250,000,000) so that means that the rewards for each day is dependent on the amount of SP mined meaning there is a maximum amount that the steemit community can make collectively in a single day. Because of this maximum profit collectively, it has been taken on by some users (not just the Berniesanders bot army) to actively work to prevent the wealth from being built up by a few so that more can go to other users. Now without the specifics, I am not certain whether daily reward caps are being reached in steemit or not. You made the argument on why there wasn't an upvote spread to other authors though and the reason is to not deplete the daily reward pool. Now it is slightly hypocritical for the berniesanders bot to add to the reward pool and then take a large cut (then again many agree with that understanding that berniesanders is, I believe, the only whales to take on Dan and kind of survive) So while many may disagree, or agree, with the bot army and its goals, it isn't without reason that downvotes were made. My best advice is, if you want, flag his post to show him you do not like his methodology (as he stated in his post as its just a throwaway account for him) and not complain like this (this is how other users get onto the flag for no reason at 100%)
I am not saying to accept it but to work with the system. Sanders is powerful and attempting to make an enemy out of him, no matter how many minnows or dolphins support you, will result the same way as his other battles ended. As I said, flag his post to show your disagreement and if there is enough support he will change, he isn't here to ruin steemit but make steemit better, he just does so in a tough love kind of way.