Sentence:  It is to Andrew Carnegie that the expression is attributed in America, "There are only two generations between <WSD>shirt sleeves</WSD> and <WSD>shirt sleeves</WSD>," The remark is certainly not original with the genial Scot, who is playing such a successful " star engagement " before the American people, nevertheless, it is a most satisfactory sentence. If the wealth which springs from the efforts made in <WSD>shirt sleeves</WSD> by one generation, is enjoyed in broad-cloth only by the next two, and that, in the fourth remove, <WSD>shirt sleeves</WSD> again become ascendant, so much the better for the country. 
Meaning of the word marked with <WSD> tags:  A  working-class socioeconomic status (not requiring a professional business jacket).