All you have to do is follow the money.
Where did virtually all of the dominant politicians go? The Obamas, Bushes, Clintons, Cruz, etc all went through a very limited set of schools.
Where did virtually all of the leaders of the big companies come from (Gates, Zuckerberg)? A very limited set of schools.
Where do the heads of media and Wall Street go? A very limited set of schools.
How connected is tech with politics now?
Schmidt was an informal advisor and major donor to Barack Obama's 2008 presidential campaign, and began campaigning the week of October 19, 2008, on behalf of the candidate.[47] He was mentioned as a possible candidate for the Chief Technology Officer position, which Obama created in his administration,[48] and Obama considered him for Commerce Secretary.[49] After Obama won in 2008, Schmidt became a member of President Obama's transition advisory board and has since become a member of the United States President's Council of Advisors on Science and Technology (PCAST).[50] Schmidt has served on Google’s government relations team.
How connected is tech with finance now?
Google's current CFO was a Morgan Stanley exec.
And then there are really shady figures who have operated within these institutions for years like Jeffrey Epstein:
He is also a longtime friend of Prince Andrew, Duke of York: they have stayed at each other's homes, and have vacationed together in Thailand. In December 2010, the prince was a guest in Epstein's New York residence for several days, shortly after Epstein completed his Florida sentence for soliciting an underage girl. His dinner with Andrew at the mansion was attended by (among others) Katie Couric, George Stephanopoulos, Charlie Rose, and Woody Allen.[9] The 50,000-square-foot (4,600 m2) 9-story mansion is just off Fifth Avenue and overlooks the Frick Collection. It is reported[by whom?] to be the largest private residence in Manhattan, having originally been built as the Birch Wathen School.
You just need to follow the money. There's way too much money at the top controlled by a relatively small group of people.