I would draw your attention to recommendation IV.11, which seeks to make the voters list more representative by authorizing a guardian to delete the name of a person who should not be on the list. I believe that is one of the proposed methods.
However, I may have a different take on the problem. It is not so much the quality of the list as the voter turnout rate that is the problem, in my view, and those two things are not necessarily related. We may want to spend more time looking at ways to increase the turnout rate, while endeavouring to keep the voters list as accurate as possible—but it will not happen overnight.