it nevertheless may be human nature that makes consumerism

A lot of energy was expended to train Americans to be voracious consumers. See this article from Orion:

The Gospel of Consumption:

[Industrialists] feared that the frugal habits maintained by most American families would be difficult to break. Perhaps even more threatening was the fact that the industrial capacity for turning out goods seemed to be increasing at a pace greater than people’s sense that they needed them…

By the late 1920s, America’s business and political elite had found a way to defuse the dual threat of stagnating economic growth and a radicalized working class in what one industrial consultant called “the gospel of consumption”—the notion that people could be convinced that however much they have, it isn’t enough. President Herbert Hoover’s 1929 Committee on Recent Economic Changes observed in glowing terms the results: “By advertising and other promotional devices . . . a measurable pull on production has been created which releases capital otherwise tied up.” They celebrated the conceptual breakthrough: “Economically we have a boundless field before us; that there are new wants which will make way endlessly for newer wants, as fast as they are satisfied.”