@TruthSandwich @jhavok @futurebird
You can of course reject all of that, or whatever subset. 1 and 2 is basically Marx taking capitalists at face value, and agreeing with them that capitalism great at driving down costs. While a and b reflects his belief that the ruling classes are motivated to protect their profits in the short run, and in doing so will prevent reforms that could make capitalism survive or at least delay change. Plenty of socialists, including some Marxists reject a/b too.