Briefly, there's a politico-cultural dimension to it. In Wales there was that kind of resentment, to the point that they did try to have a rule along the lines of the New Brunswick proposal, and Westminster overrode it. In Germany they basically almost forced everybody to be running locally as well as to be on the list. Apparently, a high percentage of German members of their legislature served in one or the other capacity over the course of their careers. One thing the German approach does is it actually gets people to understand that there isn't such a great difference between the two sets of MPs, and it produces more continuity.
Some people would say, in a “throw the bums out” culture, that's not a good thing. Obviously, I'm sitting on the wrong side of the table to be saying this, but in Canada we probably have too much turnover. We have, probably, the highest turnover in comparable legislative processes. We could benefit from, probably, having more continuity, especially in collegial, consensual legislative environments. If people who are completely new are constantly coming in high numbers, you do lose something. Germany has more continuity, and I think being able to be on both is part of it.