To see what I mean by bait and switch, think about what happened in 2004. George W. Bush won re-election by posing as a champion of national security and traditional values — as I like to say, he ran as America’s defender against gay married terrorists — then turned immediately to his real priority: privatizing Social Security. It was the perfect illustration of the strategy famously described in Thomas Frank’s book “What’s the Matter With Kansas?” in which Republicans would mobilize voters with social issues, but invariably turn postelection to serving the interests of corporations and the 1 percent.

In return for this service, businesses and the wealthy provided both lavish financial support for right-minded (in both senses) politicians and a safety net — “wing-nut welfare” — for loyalists. In particular, there were always comfortable berths waiting for those who left office, voluntarily or otherwise. There were lobbying jobs; there were commentator spots at Fox News and elsewhere (two former Bush speechwriters are now Washington Post columnists); there were “research” positions (after losing his Senate seat, Rick Santorum became director of the “America’s Enemies” program at a think tank supported by the Koch brothers, among others).

The combination of a successful electoral strategy and the safety net made being a conservative loyalist a seemingly low-risk professional path. The cause was radical, but the people it recruited tended increasingly to be apparatchiks, motivated more by careerism than by conviction.

And the specific issue that loomed largest, immigration, also happens to be one on which the divergence between the base and the party elite is wide. It’s not just that the elite believes that it must find a way to reach Hispanics, whom the base loathes.