[dragonwriter]

> There’s no monolithic “ruling class” that both major parties serve equally

There is a ruling class (capital), but it is not – nor is it asserted to be – monolithic. There are conflicts as well as common interests within it; the common interests are more consistently served by government bipartisanly because the dominant factions of each party answer to (different, but overlapping, subsets of) the capitalist class. The points on which the ruling class are also the points of genuine (rather than ginned up to build support on other issues) divisions between the parties.