"While the miser is merely a capitalist gone mad, the capitalist is a rational miser"

Karl Marx's quote is a criticism of capitalism. He is recommending that capitalists are basically misers, but with a logical method. The miser is somebody who hoards their wealth and declines to spend it, while the capitalist is somebody who invests their wealth in order to make more money. Marx is implying that capitalists are driven by greed and are only interested in accumulating wealth, instead of using it to benefit society. He is suggesting that capitalism is a kind of insanity, as it motivates people to be selfish and to prioritize their own financial gain over the requirements of others. Marx's quote is a tip that commercialism can lead to inequality and exploitation, and that it ought to be managed in order to ensure that it is used for the advantage of all.