Slightly disagree with your assumption that all will vote only for top users to get their voice instead.
it's a lot harder to become visible for some whale, who will vote for you in return, than to receive recognition from minnows which will gradually grow (with your help too).
I think many people understand this, so they try to build relationships with all members of the community.
Thanks for your opinion. :)
Let's hope you will be right, but so far I am not convinced ... We will see what happens (and of course I am not a clairvoyant as well :) ... But if you check the voting behavior of some minnows (for example using SteemDB) you may come to the same conclusion like I do: they are upvoting articles from the trending page and well known users much more frequently than posts of other minnows (this is becoming even more obvious if you compare the huge number of minnows with the small number of 'VIPs' who nevertheless get a big percentage of the votes).
Many minnows try to build relationships by commenting ... but often they are not voting on articles, because (besides of other reasons) all their available voting power is already exhausted.
And apart from that for the "top users" it is also much more lucrative to spend their few heavy votes for some of their 'colleagues' to get some nice reward back ...
Indeed, today the situation looks that way, I am sure that you are right in your observations. Perhaps, my previous replay was of the sort "dream out loud" :)