Following Dubček's election as First Secretary of the Communist Party of Czechoslovakia, Šik was made a deputy prime minister in April 1968 and he was the architect of the economics section of Dubček's action programme. Šik claimed that if his policies were followed then Czechoslovakia would be on an economic par with neighbouring Austria within four years. However these plans were never followed out after the Prague Spring was brutally ended in August of the same year by the tanks of the Soviet army.