Oliver's comedic commentary has been credited with helping influence US legislation, regulations, court rulings, and other aspects of US culture; this influence has been dubbed "The John Oliver Effect."[54][55] This came from the show's fifth episode, which dealt with net neutrality, a subject that had previously been considered obscure and technical.[56]Oliver documented problems attributed to internet service providers and argued that the Federal Communications Commission (FCC) could resolve these concerns with upcoming changes to internet regulation. Oliver then encouraged viewers to submit public comments through the FCC's website. The FCC's website promptly crashed.[57] Internal FCC emails revealed the clip was being watched inside the agency.[58] FCC Chairman Tom Wheeler publicly addressed the video.[59] The FCC was flooded with 3.7 million comments on the subject, by far the most for any issue in the agency's history.[60] Reporters detected a shift in the FCC's stance: Before Oliver's segment, The New York Times described an FCC proposal that would leave net neutrality "all but dead,"[61] but the paper later said that chairman Wheeler showed "a steady shift toward stronger regulation."[62] Ultimately, the FCC enacted robust net neutrality rules that classified broadband internet service as a public utility.[63] Oliver was credited with transforming the net neutrality debate.[56] The official YouTube video of his net neutrality segment has been viewed over 12 million times as of October 2016.[64]
A Ninth Circuit Court judge cited a Last Week Tonight segment about the lesser constitutional rights of residents of US territories in a ruling in favor of the residents ofGuam.[65][66][67] Members of Congress credited Oliver with helping win a vote to enforce protections for chicken farmers who speak out about industry practices after a Last Week Tonight segment aired on the subject.[68][69][70] A Washington, D.C. council member proposed a resolution in Oliver's honor after he aired a segment on the district's struggle to attain statehood.[71][72]
Oliver maintains that he is not a journalist,[73] but reporters have argued that his show does engage in journalism.[74][75][76] The Peabody Awards honored Oliver, saying his program engages in "investigative reports that 'real' news programs would do well to emulate."[77] One example of Oliver's investigative work is a segment on The Miss AmericaOrganization, which bills itself as "the world's largest provider of scholarships for women."[78] Oliver's team, which includes four researchers with journalism backgrounds,[79]collected and analyzed the organization's state and federal tax forms to find that the organization's scholarship program only distributes a small fraction of its claimed "$45 million made available annually."[80] Oliver said that at the national level, the Miss America Organization and Miss America Foundation together spent only $482,000 in cash scholarships in 2012.[78] Oliver found that at the state level, The Miss Alabama Pageant claimed that it had provided $2,592,000 in scholarships to Troy University despite not actually distributing any such scholarships.[81] The pageant appeared to multiply the value of a single available scholarship by the number of contestants theoretically eligible for it, while using the term "provided" in a way that did not mean "distributed." The official YouTube video of Oliver's Miss America segment has been viewed more than 13 million times.[82] TheSociety of Women Engineers said Oliver's mention of their scholarship in his story led to $25,000 in donations in the first two days after the episode.[83]
Oliver has also founded and legally incorporated a church, Our Lady of Perpetual Exemption, to demonstrate how easy it is to qualify as a church and receive tax exempt status in the United States.[84][85] The church was created in conjunction with a segment on televangelists who have tax-free mansions and private jets funded by millions of dollars in donations, which are sent in the belief that money given to televangelists can result in God rewarding donors with money, blessings, and cured diseases.[86][87] The next week, Oliver showed off the large quantity of unsolicited donations mailed to him.[88][89] The church's website stated that donations would go to Doctors Without Borders upon the church's dissolution.[90]