People are always welcome to buy more steem, power it up, and form their own "groups". In fact one could argue that kind of activity would be more beneficial for prices than arbitrarily voting as many authors as possible, like the 2k you mentioned in the post.

One thing that was interesting was that you didn't mention anything about the quality of the posts of those users you call 'abusers' (again whatever that means in an open system without rules), yet later you talk about upvoting quality content. Are we about quality or are we about spreading the wealth? There seems to be some contradiction there. Your arguments lean more towards the latter, and if that is the case then yes we should just be a true POS blockchain, where stake determines reward.