Economics is mostly a matter of theory or models therefore the Magisterium cannot promote one theory or model over another no more than it can promote democracy over any other form of government and it doesn't despite what you say. Encyclicals have criticised aspects of all types of economic theory without endorsing any. 
Even if you were right that the encyclicals condemn the 'trickle down' effect all the evidence is to the contrary. We in the west are manifestly better off than previous generations and the process has been gradual. My grandfather possessed a donkey, my parents relied upon motorised public transport, an improvement, I have a car, a further improvement, my children have had cars at a much earlier age than I and so it goes with hiccups here and there along the way.
Pope Francis's ideas on economics may stem from the fact that he spent his life in a country which is a chronic, economic and political basket case.