Something else has changed, too: increasingly, Fox News has gone from merely supporting Republican candidates to anointing them. Christine O’Donnell, the upset winner of the G.O.P. Senate primary in Delaware, is often described as the Tea Party candidate, but given the publicity the network gave her, she could equally well be described as the Fox News candidate. Anyway, there’s not much difference: the Tea Party movement owes much of its rise to enthusiastic Fox coverage.

As the Republican political analyst David Frum put it, “Republicans originally thought that Fox worked for us, and now we are discovering we work for Fox”  literally, in the case of all those non-Mitt-Romney presidential hopefuls. It was days later, by the way, that Mr. Frum was fired by the American Enterprise Institute. Conservatives criticize Fox at their peril.

So the Ministry of Propaganda has, in effect, seized control of the Politburo. What are the implications?

Perhaps the most important thing to realize is that when billionaires put their might behind “grass roots” right-wing action, it’s not just about ideology: it’s also about business. What the Koch brothers have bought with their huge political outlays is, above all, freedom to pollute. What Mr. Murdoch is acquiring with his expanded political role is the kind of influence that lets his media empire make its own rules.

Thus in Britain, a reporter at one of Mr. Murdoch’s papers, News of the World, was caught hacking into the voice mail of prominent citizens, including members of the royal family. But Scotland Yard showed little interest in getting to the bottom of the story. Now the editor who ran the paper when the hacking was taking place is chief of communications for the Conservative government  and that government is talking about slashing the budget of the BBC, which competes with the News Corporation.

So think of those paychecks to Sarah Palin and others as smart investments. After all, if you’re a media mogul, it’s always good to have friends in high places. And the most reliable friends are the ones who know they owe it all to you.