You didn't have to be poor to be frugal. American frugality was a way of life on the prairies and farms of America for most of the eighteenth, nineteenth and first half of the twentieth century. It was only after 1950's that piles of consumer products were discarded to pile up in rubbish mountains somewhere in the Atacama desert in Chile by 2020. The over use of plastic contaminated the land and the oceans. The consumer debt led to money sent overseas that could be invested in America so that workers could have good jobs and American manufacturing could hold its place in the world as second to none.
As old habits are revived some areas in America from upstate New York to upstate Michigan still cling to the old values as shown in this report by Claire Ansberry in the WSJ.