The General Theory Of Employment, Interest and Money was published in 1936.Your account of why your country declined completely rewrites history by ignoring the fascist coup of 1930, and the decades of political instability and intermittent military dictatorship which inevitably followed. Moreover, your understanding of the economic factors is particularly woeful:
Someone has obviously never read Keynes.
Every Argentinian president followed Keynesianism since then, price control, wages determined by hand, restriction of foreign trade and expansionary monetary policies. Everything that always went wrong.