If Trump or Cruz are elected President the Republicans and Democrats will simply stymie any attempt they make to correct things. Trump and Cruz will be easily handled by the elites who want money and power and D*mn the people. If by some miracle Trump and Cruz threaten to become really effective agents of material change the combined forces of Democrats and Republicans will simply treat them as Liberalism did "Ole" Huey Long in the 1930's.
Keep in mind that pessimism is an unhealthy trait that can diminish those it afflicts.