"Nobody in America thinks they're poor. They all just think they haven't struck it rich yet."
Until the liberal/socialist movement began to define Americans by class, most American citizens didn't think of themselves in those terms--thus, the great dignity and optimism of those who simply made less money than others--always aspiring to something better, and not resenting those who might have more money.
We were all in it together, and, largely, adhered to the Lincoln admonition:
"Property is the fruit of labor...property is desirable...is a positive good in the world. That some should be rich shows that others may become rich, and hence is just encouragement to industry and enterprise. Let not him who is houseless pull down the house of another; but let him labor diligently and build one for himself, thus by example assuring that his own shall be safe from violence when built." The Collected Works of Abraham Lincoln edited by Roy P. Basler, Volume VII, "Reply to New York Workingmen's Democratic Republican Association" (March 21, 1864), pp. 259-260.
"And, inasmuch [as] most good things are produced by labour, it follows that [all] such things of right belong to those whose labour has produced them. But it has so happened in all ages of the world, that some have laboured, and others have, without labour, enjoyed a large proportion of the fruits. This is wrong, and should not continue. To [secure] to each labourer the whole product of his labour, or as nearly as possible, is a most worthy object of any good government." The Collected Works of Abraham Lincoln edited by Roy P. Basler, Volume I, "Fragments of a Tariff Discussion" (December 1, 1847), p. 412.
"...the working men are the basis of all governments, for the plain reason that they are the most numerous..." The Collected Works of Abraham Lincoln edited by Roy P. Basler, Volume IV, "Speech to Germans at Cincinnati, Ohio" (February 12, 1861), p. 202. Source