Even billionaires and millionaires who dont own media companies have outsized influence. They can fund politicians they prefer to an extent that a rival might not be able to match. They can pay for lobbyists. There are a myriad of ways that dollars turn into votes without a mustachioed man walking around with a bag of money being involved. Mass movements aside the working class isnt out there propping up politicians.

Murdoch's own papers claim credit for election victories. I don't know the exact conversion rate from dollars to votes, but it's absurd to suggest one doesn't exist and that Murdoch's organizations don't know what it is.