I was also somewhat skeptical of the author's claim that the barrier to entry for Wikipedia editors was the editor itself. I've read a few papers concluding that Wikipedia contributions are declining because of the community pushing out people who don't understand the
many rules that have been developed[1], or in other cases because editors have gotten into turf wars over articles they feel some sense of ownership over[2]. Meanwhile, I haven't read anything concluding that the editing environment was a strong deterrent (although I haven't been looking, so I could be willfully blind).
Edit: more articles identifying interpersonal friction as the leading factor deterring would-be editors [3,4]. At this point I'm suspicious of the author's due diligence in studying the problem, making the proposed solution more dubious.
[1] Suh, Bongwon, et al. "The singularity is not near: slowing growth of Wikipedia." Proceedings of the 5th International Symposium on Wikis and Open Collaboration. ACM, 2009.
[2] Thom-Santelli, Jennifer, Dan R. Cosley, and Geri Gay. "What's mine is mine: territoriality in collaborative authoring." Proceedings of the SIGCHI Conference on Human Factors in Computing Systems. ACM, 2009.
[3] Kittur, Aniket, and Robert E. Kraut. "Harnessing the wisdom of crowds in wikipedia: quality through coordination." Proceedings of the 2008 ACM conference on Computer supported cooperative work. ACM, 2008.
[4] Halfaker, Aaron, Aniket Kittur, and John Riedl. "Don't bite the newbies: how reverts affect the quantity and quality of Wikipedia work." Proceedings of the 7th international symposium on wikis and open collaboration. ACM, 2011.