kirkmc Wikipedia is constantly critizised for strong political bias. Most notably by co-creator Larry Sanger. It is true that anybody can make an edit, but there is a hierarchy of admins who will remove your edit if it doesn't align with their views.
I like the OP suggestion and I also like the suggestion for other sources like Britannica. Let the user choose what she prefers, as long as it fits within the limitations that Kagi will have regarding cost and effort.
I would also suggest for Kagi to look into integrating non-English encyclopedias as an option for people. In many languages, they will be more comprehensive than Wikipedia.
For me personally, I would like to replace the Wikipedia on the right with an image gallery for my search term, as I find this much more useful. But I understand that it might be too expensive for Kagi to offer this.