    Sentence’ 1: Increased saving ‘by’ current  generations.’ would’ expand the. nation's  capital stock, allowing future generations to.  better: afford the nation's retirement costs  while’ also enjoying higher standards. of  living.    Sentence’ 2: Increased. saving’ ‘by . current  generations would -not expand the nation's  capital stock, and future generations would  "he unable afford the nations retirement  ts.