Cmv: incumbents should need more votes to get elected than challengers:
Incumbents have the advantage of being able to grant political favors immediately, better financing, gerrymandering, and name recognition. Challengers need a boost to make it fair. This would cause higher turnover, which would be good because:

* It would reduce the corrupting influence of non quid pro quo contributions by making it more uncertain how long the purchased influence would last

* High turnover of representatives would disrupt the habits that form which serve their interests over the people's, such as proposing the most contentious bills to wring money out of lobbyists

* When a majority of representatives are freshmen, they will be more idealistic and less jaded, and this will help them serve the public good

I'm not sure what the best way to implement it is, but maybe just decrease incumbent's vote tally by 15% or so. My view is that something like this *should* be done, not that it's likely under present circumstances.