Rosenberg’s first line sounds like John Maynard Keynes’s “Paradox of Thrift” theory which claims that personal savings are a net drag on the economy during a recession. The second line sounds more like Ludwig von Mises, who wrote, “Capital is not a free gift of God or of nature. It is the outcome of a provident restriction of consumption on the part of man. It is created and increased by saving and maintained by the abstention from dissaving.”