Purging dead people and people who've moved is something the left disapproves of? I personally think it's a great idea, as it increases voter confidence in election integrity. Election integrity is important, so that people who vote can feel confident their votes is being counted and makes a difference/has an impact on who is elected. This is something that is required that is not being done, that's why people and orgs like Judicial Watch have to get involved and expose gov failure and force the issue.