They aren't stupid, they're just comfortably selfish and have their curtains drawn so they don't have to see the unpleasant realities they know are there.
They know a strong middle class and upward mobility makes a strong economy they can make long term money in. A strong middle class is like a trust fund. Their center-right policies were basically a "break" to keep the ones they thought were undeserving out of their club, and that's been pretty much their primary goal. Making money and living the Great Gatsby life. The Heritage Foundation promised that, the next Gilded Age.
Unfortunately, with the right wing organization came the "Heritage Youth" training from an early age - so their kids have become isolated, privileged, and socially ignorant, instead of well educated, challenged, and travelled.
And they're finding out what a failure rigid conservatism is with the false realities and poor decisions their brats are making coming back to bite them in the butt.
Hastily built short term successes requires a level of corruption or delusion that cannot be sustained. That's the weakness built into those sorts of systems.
And the Country Cub Conservatives are just discovering the loose dirt and sand covering the high liquified bullshit table beneath the Heritage Foundation (as it were) is cracking apart.