<p>The OP raises an interesting question. However, I feel "Can we do something to diversify our voting and encourage the new users?" may be an example of an XY Problem.</p>

<p>Personally, I'm not sure the "rich getting richer" phenomenon (if it exists) on SE is an issue. I've come to Stack Exchange off and on for several years now with statistics questions and found many helpful experts here. To be honest, I don't think having lots of points is terribly meaningful - more helpful is clicking on a respondent's profile to learn their background and expertise.  Surely there are qualified statisticians/data analysts who simply don't have the time to write responses in their field of expertise. </p>
