The left-wing bias of Wikipedia

Reality has a left-wing bias compared to Rhetoric.

Or rather, rhetoric has a right-wing bias because "he who pays the piper calls the tune". People like

https://en.wikipedia.org/wiki/Richard_Mellon_Scaife

spend a fantastic amount to push various right-wing causes. For instance they could easily pay people all day to edit Wikipedia and if there were not countermeasures we would see a lot more of it. (e.g. «General Motors» would love to own its Wikipedia page)

Does it go without saying that an organization that points out the left-wing bias of Wikipedia must itself be right wing? I am a conservative myself and it seems that rational and self-critiquing liberals are in short supply these days.