The r party is moving towards trade protectionism, is hostile to illegal immigration, and populism. Corporations (for fear of the sanders economic liberal wing) are moving to embrace diversity wokeism. Big corps like McConnell Cheney Romney type republicanism but are increasingly tilting dCorporate money could swing either way (& swings both ways) at the drop of a hat. Corporations have zero political allegiance. They want stability and, frankly, control. T was not stable - he did a lot that the corporations really like, traditional conservative policies on tax and regulations, and then he did things they hate, on trade tariffs and fostering instability, not traditional conservative policies. Rs moving away from foreign wars is very funny - there are a plethora of R hawks.
As for your coalitions - the poor and working class will get shafted either way (see corporations), the rich will get richer either way and the middle class have a block that can swing either way (they just swung D because they couldn't take T anymore). Politicians like cultural wars because they don't get judged on policy. This isn't uniquely American, you can see the same thing in Europe, e.g. see the UK & Brexit.
you’ve basically outlined the problem for the d coalition in the tensions between rich and poor since those form the 2 poles of their governance. The suburban Upper middle class is also not going back r as long as they embrace the populist America first rabble. The d coalition is bigger but more unstable....it’s been held together this round because Biden campaigned from his basement and was an Everyman to everyone (remember him promising to ban fracking then saying fracking was ok???)