The correct answer to this open question is the following.
The development from 1775 to 1900 that could be used to support the pyramid of capitalism systems interpretation could be the Gilded Age. The Gilded Age was a time in the United States history when powerful industrialists grew to become monopolies.
The Gilded Age was a time in which rich businessmen increased their fortunes by buying their competitors and creating monopolies, in combination with government corruption acts. That was the case of Jhon D. Rockefeller of the Standard Oil Company and Andrew Carnegie of the US Steel Company.
The Pyramid of Capitalism is a cartoon representation of the hierarchy of Capitalism. The cartoon was drawn in 1911.