What exactly are you saying? Are you suggesting that thousands of Wikipedia editors have all been subborned by Western military agencies? Or are you just referring to the overpaid Wikimedia C-suite?
Of course some Wikipedia editors are shills. Most MSM journalists are shilling for someone; if you pay attention to current affairs, you'll bump into a shill within seconds. But Wikipedia is largely self-correcting; even if the mainspace articles are biased, (a) there's page history; (b) there's per-editor contribution history; and (c) there's talk pages. I don't know of any other information source that provides so many tools that a critical reader can use to judge the content of an article.