    ‘Sentence. 4: Whs challenges ‘the notion. of ‘the Kumets  curs hypothesis?    Sentence'a: Moreover, Piketty argues that the “magical”  Kuznets. curve -hypothésis, with’ its emphasis, onthe  balancing, of economic growth in the. long run, cannot  account for the significant increase in economic inequality  throughout the developed world since.the 1970s.    