Probably will not be done. I believe there was something like this before, but it was removed. Anyway people WILL overdo it with the spam up-voting, and no one wants that.
but for some very minor points; around about 5 points for each upvote.
5 points is not less. Upvoting 20 (Which is not much, seeing as we have such experienced people here making answers, it's common to upvote things) questions or answers will easily get you 100 points. People would not hesitate to click a button.
Maybe Pokemaster that you could make this a trial for three days or something to see if this could work and if that some people will spam (and if the spamming is an issue)
Why give a three-day trial to something that we know will end up in disaster?