Oh gosh. Why do candidates have any business filtering voters?
Basically you are saying that some people will not have the ability to decide who will govern them.
I just think it would be gamed somehow, like the games played with gerrymandering.
There was an idea going around that instead of voting for candidate, you would answer a questionnaire about policies, and would be matched with best fit candidate.
The questions itself would be compiled from candidates' policies, and candidate would assign the weights to each of the answers.