In the US the president can pick a lot of the people who work under him. He isn't as limited as UK or German politicians in that regard.
Big tech companies also go through a lot of negotiations. They acquire companies, negotiate deals with other companies and they do lobby for political legislation.
They still aren't Washington insiders. They lack relationships and inside knowledge about how deals get made in Washington. That's not perfect but they can hire people who do know how Washington works.
To the extend that we aren't happy with the way Washington works and want a change in how it operates, having a president who's not a Washington insider has advantages.
I just saw that Donald Trump is running for president. Which led me to the following thought: would any of the big names in tech have a chance at being elected president of the US? Elon Musk? Sergey Brin? Jeff Bezos? Reid Hoffman? Peter Thiel? Edit: Bill Gates?
Some follow up questions/thoughts:
Edit: hypothetically, if one of these big-name tech people were to try to gain political power, how should they go about doing so?